I'm looking to spend up to about $275 for sub(s) for my car. I'd like them to be more sq oriented than spl, but pretty much in the middle between the two if possible. I will be listening primarily to rock in nearly all of its many varieties. For a few months, I'll probably have about 1500 watts (from a cheap amp) to run them with until I can afford buying a nice amp. Recently I've been looking at 2 12" Diamond Audio D3's. Do the Diamonds sound like a good idea? Other suggestions?