go with
athlon 64 3500 $280
Asus a8n sli deluxe $200
1x 1 gig stick of at least 3200 ram around $200(itll be more expensive than 512x2 but will work about the same and will be very future proof)
6800 gt $400
1x 120 gig 7200 rpm hd $100
cheap cd read/writer $25
Lite-on dual layer 16x dvd burner $50
onboard sound(unless you really care which i dont)
Total cost: $1,250
some people may disagree but this is a GREAT system except you might want to switch around the mobo for something else. hard drive should be big enough unless you have 5 kajillion songs and 250+ hours of tv you want to store. and most people will disagree with me about the ram but 2 sticks of 512 will not be much better than 1 stick of 1 gig and youll be able to throw another gig in later