In my SE-R I have 1 12" Infinity Kappa PERFECT 12.1 sub mated with a Xtant x604 amp (also drives Diamond HEX Components), and I am pretty happy with it on the whole. However, I'm putting a system now into my 95 Impala SS and I want some more umph, but my main concern in SQ, I'm a SQ freak above all else and really don't show off my system. Money really isn't an issue (but saving it would be nice too ) so what would you guys suggest as far as good subs? I love Infinity's, but is there something alot better out there I should be looking at? I already got a used Xtant X1001 amp to run em (on the cheap via ebay). Thanks in advance.