JL makes some nice stuff no doubt. Their amps are ownage, however they are extremely pricey. You will not be disappointed. If your looking at w6's (great subs I might add) check out www.edesignaudio.com They have subs that will do everything a w6 will, and they cost WAY less. I have personally owned a pair of the K's, and they rocked. I compared them against a buddy's w3's, and hands down the K's blew away the w3's (both subs were sealed in proper enclousres) so they are very comperable to the w6's. Anyways, good luck with it. Either brand you choose, you cannot go wrong with them.