I'm also sporting the same motherboard :)
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Here's the final set up, made some changes according to what you guys told me. :
Does that look nice and final? Might need some help building the thing too, first time, ahaha.
Definitely need to go for a higher PSU, perhaps I just read it wrong but 350w more than likely wont run all that.
As for the card, go for ATI (I guess its AMD now), yes Im an AMD fanboy but to hell with it they're just cheaper... and give out around the same anyway - plus your pairing it with an AMD cpu.
Everything else looks fine, personally Im not a fan of the ripjaws for ram, try Vengeance or higher.
I built mine around 7 months ago so Im not clued in with what current hardware is about (besides the cpu) but aside from that it looks like a fine build.
As for the PSU and just about everything else (heres hoping your not american), Novatech.co.uk - best prices I managed to find AND they do their own line of Silent PSUs which tend to work around the same as the big brands for half the price.
Edit: Bogui has a point =p the 6870 is badass, I haz it, and if you need more at any point try and find a motherboard with enough slots (2x x16) so that you can run crossfire at a later date.
Good luck.