what series of JL.....in past all JL subs were great. but in last several years quality has gone down on some models, since people whant cheap stuff. if it's 250w RMS then probably the w3's which are very nice speakers, if it's max power then probably W1 which aren't that great. not that w1 is complete junk, it's just not a JL....if that makes since. it's made over sea's not in us like old JL's were...so may say JL but doesnt havr smooth bass roll off.
as for Alpine..they are probably still ok... they live off their name though...kind of like bose for home audio...over prices for what they are
95 YJ, 4" suspension lift, 32's, 2.5l 4 cyl (350 built and waiting to be installed in spring, along with ford 8.8 rear end)
that should be a good setup im always down for anything alpine...and honestly anything is going to be better than a bazooka tube. Im running a single mtx thunder 12" with a Power Acoustik amp and it rattles everything including my brain.