Something tell's me I should get the AX850. But, for £40 cheaper I can get the 750W Corsair HX Series Modular power supply? What are you thoughts on this. I'm using it to only power a i5 2500k and I'll be purchasing a new Nvidia or ATI card when they come out probably a GTX 670, If that's what they're going to be called, which I would imagine is close the the power consumption of the current 570.