I would get the 6850 if you have the money for it. It is much more powerful. And, that price for the 5770 seems a little high. I just bought an HIS HD 5770 from newegg and it came out to $109 shipped after rebates. I know it's not an XFX, but I'd say its pretty much the same thing except without a lifetime warranty. If you have the money, I would absolutely go with the 6850. It has much more potential. The only reason I got a 5770 is because I'm a broke college student.