Wait until late 2014 for the new 800's or go with a GTX 780 card?
If 780...thoughts on which one (Asus DirectCU II, MSI Gaming, MSI Lightning, EVGA, etc). I really like the idea of a trying to not add too many new colors (currently have almost all black with a bit of red).
The planned use for this system is a combination gaming/streaming/rendering/3d
if its a $500 build i suggest a gpu in the gtx600 series getting a gtx780 might go over your budget. try visiting newwegg they have a large selection gpu's for 50-200. might wanna get a gtx650
@Houndz I think he's talking about a 500 dollar GPU, considering his build is twice that XD. As for my recommendation, You could get a 780, but I would highly suggest taking a look at the 290x from AMD. It's a bit more expensive, but with Mantle on the horizon AMD could get a serious leg up on Nvidia. Here's a gpuboss comparison, and this is without mantle: http://gpuboss.com/gpus/Radeon-R9-290X-vs-GeForce-GTX-780