'96 Camry LE Sedan

Pioneer DEH-P8200
Infinity Reference 652i - Fronts
Infinity Reference 6913i - Rears
Sony XM-404EQX 4x40 amp

Looking to get a sub. I want something with quick, tight bass...not punchy. Had a Rockford Fosgate punch amp and dual 12" MTXs, and it was way too punchy/boomy and overpowering. Any recommendations? Everybody says go for the JL 10". What amp would be good for that? Also, are any subs that have built-in amps good?