Subwoofer suggestions

I've been talking with nbrowser about upgrading my Dodge Journey's sound system. I have it in the shop for them to fix all the screwups but here's what I have already that needs to be re-integrated:
Focal Auditor 5.25 component speakers front doors
AudioControl LC7i Line Out Converter
JL Audio 4 channel amp
SoundOrdnance powered 8" underseat sub
It was suggested to me that I may want to forgo the powered sub and go right to a box sub and power it from the spare 2 channels bridged from my JL amp. I don't even know where to start so can someone help me with some suggestions? I'm not limiting myself to any specific brands, but I want the bass to be tight and punchy--not muddy and boomy. I like to listen to a lot of jazz, singer/songwriter and progressive metal. Any help would be appreciated. Would prefer a single driver system because I don't want to take up much space in the back. Also, should I go ported or sealed?
Focal Auditor 5.25 component speakers front doors
AudioControl LC7i Line Out Converter
JL Audio 4 channel amp
SoundOrdnance powered 8" underseat sub
It was suggested to me that I may want to forgo the powered sub and go right to a box sub and power it from the spare 2 channels bridged from my JL amp. I don't even know where to start so can someone help me with some suggestions? I'm not limiting myself to any specific brands, but I want the bass to be tight and punchy--not muddy and boomy. I like to listen to a lot of jazz, singer/songwriter and progressive metal. Any help would be appreciated. Would prefer a single driver system because I don't want to take up much space in the back. Also, should I go ported or sealed?
TV: 70" LED Sharp Aquos Quattron 3D
Fronts: Energy RC70 --- Center: Energy RC-LCR
Front Heights: Polk RC65i --- Rears: Polk RC85i --- Sub: Power Sound Audio XS15
Pioneer VSX-1120K --- Parasound HCA-1000A --- Oppo BDP-103
Vincent Audio SA31 preamp --- Teac UD301 DAC
Fronts: Energy RC70 --- Center: Energy RC-LCR
Front Heights: Polk RC65i --- Rears: Polk RC85i --- Sub: Power Sound Audio XS15
Pioneer VSX-1120K --- Parasound HCA-1000A --- Oppo BDP-103
Vincent Audio SA31 preamp --- Teac UD301 DAC
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Comments
http://www.ebay.com/itm/Alpine-SBR-S8-4-Enclosed-Type-R-8-Car-Subwoofer-in-Ported-Sub-Enclosure-SBRS8-4-/351316708214?pt=LH_DefaultDomain_0&hash=item51cc1b8b76&vxp=mtr
Install Pics
http://x3.xbimmers.com/forums/attachment.php?attachmentid=846551&stc=1&d=1365983591
http://s1244.photobucket.com/user/Purple-Car/media/2014 Fiesta ST/IMAG0821_zpsw9dwg8pc.jpg.html
Feedback
http://www.diymobileaudio.com/forum/member-reviews-product-comparisons/113921-alpine-sbr-s83v-type-r-8-alpine-prefab-ported-enclosure.html
http://www.amazon.com/Alpine-Sbr-s8-4-Subwoofer-Enclosure-Preloaded/product-reviews/B00E1BOFUA/ref=cm_cr_dp_see_all_summary?ie=UTF8&showViewpoints=1&sortBy=byRankDescending
You can DIY a small sub system that will offer that dry musical bass sound on the cheap. Get the low Q (0.3) TangBand W8-740P and put it in a super small sealed .3-.5 cu ft enclosure.
http://www.parts-express.com/tang-band-w8-740p-8-subwoofer--264-854
http://www.ebay.com/itm/8-SINGLE-30-CU-FT-UNIVERSAL-BLACK-SUBWOOFER-SUB-SPEAKER-ENCLOSURE-BOX-/271766015803?pt=LH_DefaultDomain_0&hash=item3f46844f3b&vxp=mtr
HDTV - Sharp AQUOS LC-70LE600U 70" | AVR/Streamer - Onkyo TX-NR3008 | Amp - Parasound HCA-1203A
Blu-Ray/Media/Gaming - Sony PS3-320GB / Microsoft Xbox One | Broadcast - Xfinity X1 Platform
Front Spkrs - Coming...DIY Statement II | Center Spkrs - Coming...DIY Statement II | Rear Spkrs - Artison Portrait LRS
Sub - DIY Stereo Integrity HT 15 | Sub Amp - Dayton Audio SA1000
Wire - Audioquest Type 4, BJC Belden 5000 | HDMI - BJC Belden | Power Cables - Pangea | Surge - Monster
Fronts: Energy RC70 --- Center: Energy RC-LCR
Front Heights: Polk RC65i --- Rears: Polk RC85i --- Sub: Power Sound Audio XS15
Pioneer VSX-1120K --- Parasound HCA-1000A --- Oppo BDP-103
Vincent Audio SA31 preamp --- Teac UD301 DAC
HDTV - Sharp AQUOS LC-70LE600U 70" | AVR/Streamer - Onkyo TX-NR3008 | Amp - Parasound HCA-1203A
Blu-Ray/Media/Gaming - Sony PS3-320GB / Microsoft Xbox One | Broadcast - Xfinity X1 Platform
Front Spkrs - Coming...DIY Statement II | Center Spkrs - Coming...DIY Statement II | Rear Spkrs - Artison Portrait LRS
Sub - DIY Stereo Integrity HT 15 | Sub Amp - Dayton Audio SA1000
Wire - Audioquest Type 4, BJC Belden 5000 | HDMI - BJC Belden | Power Cables - Pangea | Surge - Monster
Fronts: Energy RC70 --- Center: Energy RC-LCR
Front Heights: Polk RC65i --- Rears: Polk RC85i --- Sub: Power Sound Audio XS15
Pioneer VSX-1120K --- Parasound HCA-1000A --- Oppo BDP-103
Vincent Audio SA31 preamp --- Teac UD301 DAC
http://img.photobucket.com/albums/v711/WLDock/Car Audio/IMAG0413.jpg
http://smg.photobucket.com/user/WLDock/media/Car Audio/IMAG0412.jpg.html?sort=3&o=7
Once I get a 2 ch rig together and a new car I'm for sure going to put a system together....its been too long. ...the quest for clarity, detail, impact, and tight bass never ends!
HDTV - Sharp AQUOS LC-70LE600U 70" | AVR/Streamer - Onkyo TX-NR3008 | Amp - Parasound HCA-1203A
Blu-Ray/Media/Gaming - Sony PS3-320GB / Microsoft Xbox One | Broadcast - Xfinity X1 Platform
Front Spkrs - Coming...DIY Statement II | Center Spkrs - Coming...DIY Statement II | Rear Spkrs - Artison Portrait LRS
Sub - DIY Stereo Integrity HT 15 | Sub Amp - Dayton Audio SA1000
Wire - Audioquest Type 4, BJC Belden 5000 | HDMI - BJC Belden | Power Cables - Pangea | Surge - Monster
HDTV - Sharp AQUOS LC-70LE600U 70" | AVR/Streamer - Onkyo TX-NR3008 | Amp - Parasound HCA-1203A
Blu-Ray/Media/Gaming - Sony PS3-320GB / Microsoft Xbox One | Broadcast - Xfinity X1 Platform
Front Spkrs - Coming...DIY Statement II | Center Spkrs - Coming...DIY Statement II | Rear Spkrs - Artison Portrait LRS
Sub - DIY Stereo Integrity HT 15 | Sub Amp - Dayton Audio SA1000
Wire - Audioquest Type 4, BJC Belden 5000 | HDMI - BJC Belden | Power Cables - Pangea | Surge - Monster
Fronts: Energy RC70 --- Center: Energy RC-LCR
Front Heights: Polk RC65i --- Rears: Polk RC85i --- Sub: Power Sound Audio XS15
Pioneer VSX-1120K --- Parasound HCA-1000A --- Oppo BDP-103
Vincent Audio SA31 preamp --- Teac UD301 DAC
HDTV - Sharp AQUOS LC-70LE600U 70" | AVR/Streamer - Onkyo TX-NR3008 | Amp - Parasound HCA-1203A
Blu-Ray/Media/Gaming - Sony PS3-320GB / Microsoft Xbox One | Broadcast - Xfinity X1 Platform
Front Spkrs - Coming...DIY Statement II | Center Spkrs - Coming...DIY Statement II | Rear Spkrs - Artison Portrait LRS
Sub - DIY Stereo Integrity HT 15 | Sub Amp - Dayton Audio SA1000
Wire - Audioquest Type 4, BJC Belden 5000 | HDMI - BJC Belden | Power Cables - Pangea | Surge - Monster
Fronts: Energy RC70 --- Center: Energy RC-LCR
Front Heights: Polk RC65i --- Rears: Polk RC85i --- Sub: Power Sound Audio XS15
Pioneer VSX-1120K --- Parasound HCA-1000A --- Oppo BDP-103
Vincent Audio SA31 preamp --- Teac UD301 DAC
HDTV - Sharp AQUOS LC-70LE600U 70" | AVR/Streamer - Onkyo TX-NR3008 | Amp - Parasound HCA-1203A
Blu-Ray/Media/Gaming - Sony PS3-320GB / Microsoft Xbox One | Broadcast - Xfinity X1 Platform
Front Spkrs - Coming...DIY Statement II | Center Spkrs - Coming...DIY Statement II | Rear Spkrs - Artison Portrait LRS
Sub - DIY Stereo Integrity HT 15 | Sub Amp - Dayton Audio SA1000
Wire - Audioquest Type 4, BJC Belden 5000 | HDMI - BJC Belden | Power Cables - Pangea | Surge - Monster