If you get 2 power HX2's in a ported box(sealed i got with the JL) with atleast 1000 watts on them they will pound. I would take 2 Power HX2's over 2 of the JL's in a ported box, however comparing them to just 1 is really unfair. You will need to invest in some dynomat of something or you will sound like a loud as$ lawnmower going down the road. I also have a hard time reccomending 2 Power HX2's in a trunk, I've had really bad experiences with them in trunks not having near the output they should have, over a 10db drop with the same equipment from a Tahoe, to a Mustang. If space is the problem, and it appears to be go JL, the Rockford subs crave space. i have no experience with Punch HX2's.