VGA-HDMI if you have HDMI on your TV/reciever, or if you don't have a hi def setup I'm sure you could find a VGA-colors and that would work just as well.
I run mine DVI-HDMI into the back of my TV and it works just fine.
I would suggest buying from
www.newegg.com if you decide to go through with it. Their prices are WAY below any store prices.