1000w cougar cmx for $100 ends today at newegg.
recomend the tx750w or antech high end gamer 900w
c70/haf 932- get nice case so you can use it for other builds
just get courgar/ nauctua fans, your ears will thank you (unless wearing headset)
thermaltake a80 liquild cpu cooler looks like good option, still $40 @ newegg
i3 3220 w/ motherboard is Really cheap ~130 for the processor and -$40 off if you buy a motherboard with it
choose a grafics card that you can afford. either 660 ti/ 7850/7870/7950 will work fine.
keep in mind that youll want a 27-23" 1080p monitor $130-200 and a keyboard (I have the LITE-ON SK-1788/BS and it works fine $8)
just look at other forms like this/ search: $800 build
$500/$800 build http://www.tomshardware.com/forum/382711-31-build
Good luck and have Fun!