What should I upgrade my 4870x2 to. I was looking at a single gtx 295, 2 gtx 275's or 2 Asus 4890 top edition cards. I am really learning towards the 4890 top's because of the non reference cooler and the nice clocks I can possibly hit with tweaking the voltage. The gtx 295 is a nice card, I am looking aty that for benchmarking since it seems to beat out 2 4890's in CF when running vantage. Can anyone maybe give me some input, I keep reading reviews and it makes the decision so much harder.