New 4X6 For 1988 Trans-Am

Hi Guys, I got tired of looking at the Trans-Am sitting on the other side of the garage. So I think it's time to get it back together. Today I removed the rear factory subwoofer boxes and found the foam around the 5 inch woofers gone so I think I'm going to try refoaming them. But I want to replace the 4x6 two-ways and I'd appreciate any thoughts on Polk replacements. Thanks for any help, camaroguy.