What's the best gpu I could get for this setup..

[Defy Belief]

So I'm *kinda* psu limited, I have a coolermaster silent pro 500w.

Spec:

http://www.coolermaster.com/service/support/model/RS-500-AMBA-D3/

So it's for my living room, a sorta htpc which has just gradually grown into making it as fast as possible for abit of living room gaming on the sofa with a controller.

So, what I'll be having is likely a Maximus Gene V mATX board or a Sniper, 3570k with a clock around 4.3ghz or so. Will only have an SSD for drives, no optical bays. 8GB of ram.

Do you think I could stretch to a 7950? Baring in mind I'd want to put a little OC on this too, think I may be asking abit too much so what's likely to be the best gpu I could run with not too much strain on the psu?

EDIT presuming the newer cards are even more efficient so let me know I'm a little out of the loop..

 

[Defy Belief]

It's all going in a Lian-Li v-300 but I've made custom side panels and on the side with the gpu it will have a 80mm fan at the front of the case and then two black apache 120mm fans firing straight at the gpu so it will be nice and cool.

It probably won't be the most demanding games but who knows, could be bf4 story etc.

That doesn't look like that many watts pulled concidering the spec, I would never be benching or stress testing, it is just the 12v rail that is a slight concern.