Swapping Polk Speakers

Current Setup:
-FRONT: RTi12
-SIDES: RT800i
-CENTER: CSi30
-Rear: R20
-Sub#1 PSW303
-Sub#2 PSW110
_Receiver: Onkyo TX-NR929
-Amps: Adcom 5802
Adcom 555

Ok, before we get into debates about amps versus receivers versus speakers timbre matched, I would like to say that I have adjusted and worked at this for a long time. I know that ALL will not agree with amps, speakers, and receiver combos.

What I need is an opinion on replacing my RTi800i's with Bookshelf speakers. I have re-done my Home Theater room, and the Floor standing RT800i's have been very loyal. Unfortunately they don't fit the new set-up. What I need is a Polk Book Shelf speaker that will replace their undying sound quality, without killing the bank.

Opinions & Suggestions with why, are now solicited?!?!?!?!?!?

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