Stuff
I would recommend a set of good bookshelves over a 5.1 if you are using it for pc music.Unless your computer is in the middle of your room.... There are many speakers to look at into at your price range. I would suggest looking into Axiom, Monitor audio,RBH, B&W, Jamo, all of whom have great monitors for the price. And as far as a receiver goes I would buy a starter unit as you will most likely will upgrade in the future. Yamaha, Denon, and Onkyo are good bets as far as a decent cheaper model receivers.....