Which amp is better for two JL 12w3v2's. The soundstream xt600.2 or the kicker kx600.2 I know both are quality amps, but I've never actually heard a soundstream amp before. At 4ohms they both push out 150w per sub, is that loud enough to thump. I heard at 2ohms the SQ gets worse(and I want the best SQ I can get out of what I have). Does it get bad enough to hear the difference? Any suggestions are appreciated.