Alright I'm new to the game of car audio, but currently my car audio system.... sucks, unable to hold any of the music I listen to at the loudness I want...expected of course but a new system is needed, and i plan to do the whole system from start to finish I chosen a receiver that seems to suit my needs already and plan to purchase it soon, but I am completely unsure of the subwoofer I want, I listen to rock, and A LOT of electronic (house, dance, etc) and that means I want my bass to hit hard but at the same time it needs to be fast and keep up with the fast past music i listen to. However I only want it to hit hard due to the style of music I listen to, but also prefer pretty decent SQ, I do not need not need to be blown away by dBs but simply want a more in between SQ - SPL leaning more towards SPL. This will be for a 1999 Mazda Protege with a soon to be installed pioneer deh-7000bt receiver. I also need it to be somewhat mainstream, because I am planning to purchase it off ebay it can't be a custom deal. I'm willing to spend up to $150-200 on it through ebay meaning the retail price should be around $500. I have been researching subs for hours already, and really had no leads to finding the right sub, whenever I found something I like I found something wrong with it, so help would be very much appreciated. Simply where to look, suggested brands or just articles I should read first are fine, but an exact model would be great. Thanks for reading hope for some good suggestions =) Oh and if there any more info you want I'd be glad to share.