I am a huge P/G (and sq) fan however i am seeking some sub advice : stepping up from 10 to 12 and saw a good deal(70 each) on 2 JL 12 W0 i am not @ all familiar with JL but the rms on the JLs are 125w .are these a waste of time or should i go for what i know and snatch up the X12D2 ( 500 rms each x 2) @ 149 each even though i dont think i have enough juice to push them ??(my sub amp is 600 watts mono) is it better to be underpowered. will i still have clarity not just bump w/ the JLs or am i going backwards w/a mixed system thanks