what's a good amp to run a JL 12" W3 off the stock 2k2 non-bose HU for now, and then be good enough to run another 12" W3 later on? i'm only gettin one W3 right now, then thinking about another later on. i can get one W3 in box for only $125... normally costing over $200. should i just get 2 W3's now since i can get them for only $125?

 

For fairly cheap off the internet you can find a JBL BP1200.1 amp. Its a class D monoblock subwoofer amp and it will have more than enough power for what you need. A guy on ebay almost always has them for around 250. In the stores they should run 5-600.