Considering building a pc, need parts suggestions

Hello

This pc will be mostly used for media, music, movies, and some games. I not a fps fanatic, but I do like wow, starcraft, civ and whatnot. If possible, I'd like to build a rig that will be good for another 3-5 yrs, and cost roughly $800-900 though anything that can keep that down towards 650-700 would be great. Thanks in advance for the tips

Will probably upgrade to win7, but other wise I'm good as far as peripheral devices.

bumpity bumpbump

Just wanted to say it's up and running. Thanks for the advice!!