alpine is sq n' kicker is spl.. in mah opinion i think alpine type-x sub is better than any kicker sub then alpine type x speaks r better than anything kicker has then kicker amps r WAY WAY better than alpine amps
subs- kinda hard, other than the type r and the cvx, not really fan of there other stuff speakers-alpine amps-kicker, although i haven't seen anyone near me use the new pdx line yet, but they look really nice
Alpine has better SQ subs, Kicker better SPL subs. Speakers it would be Alpine all the way. Amps I'd actually go with Kicker as the new Alpine aren't anything special anymore.