I've found that using Crutchfield.com is a good way to find different set ups that work for a specific car. They are usually pretty spot on with their determination of if "it fits" or if it will "need some modification". They could probably help with the tweeters as well.

If you insist on listening to "dubstep", make sure you do the "biggest bang for your buck" door speaker mod and, with the right capacitors, it should shield the door speakers from the intense lows that can be delivered from that kind of music and let your subs behind the seat (and your ears) take that punishment.

Good luck!!

RL