I saw an enticing ad on craigslists for a JBL preloaded enclousure, which is the GTO1201.1, two twelve's, and a JBL GTO1201.1, which is a 1200 watt amplifier for $550. Is this a good deal? And is this going to be a quality set-up? I used to have two JL 12w6v1's, how is this going to compare...