GPU to go with i3-540?

[InfiniteNoise]

As title, I would like to keep it under £100, not much point in going for a more powerful card because of the bottleneck.

GTX 650 Ti seems ideal, is there anything better/cheaper than that? Nvidia preferred.

 

[InfiniteNoise]

I'm running Linux, which is why I prefer Nvidia, I should have mentioned that.

I just snapped up an EVGA GTX 650 Ti for 99.

Would have went for 7850 instead if I ran Windows but I've had nothing but problems with AMD under Linux.

 

[InfiniteNoise]

Saw a GTX 580 for 119 somewhere, but it's a brown box and I don't really need that much performance, not to mention that GTX 580 consumes more power, because the PC will be left on constantly.

I played games for a bit on a Quadro 2000m (which is just a slower version of GTX 460m) and it did the job fine, better than I expected so anything better than that is a step up. Out of all games I own, I play WoW the most and it's not very demanding.