Thanks for all of the input, I've been doing a lot of reading and researching and I have another load of questions: Do most amplifiers have crossovers, like so I can have the speakers play 90Hz and up, and have a separate powered sub play 90Hz and below? I would hate to beat up any speakers I get by playing too much bass with them. I am planning on getting a sub and amp and building a box for it sooner or later.
I am also hearing mixed reviews on the B&W DM302's. Some people say that they aren't so great for hard rock music, which is mostly what I listen to. I need speakers that can handle a lot of hardcore and complex music with fast guitars and drums, lots of cymbals, and screaming vocals. I am willing to spend a few hundred on speakers. For an amp how much power do I really need for my room which is about 15' by 15'? I want the system to be able to pound the room pretty hard... will this be possible with about 100w pc?