XFX is a pretty good brand from what I can see. I've got the Radeon 4770 and it's running like a top.
But the one thing I kinda noticed, and I am SURE that someone already pointed this out, was that the 9800 GTX+ was rated higher than the 4770. I had that card before the Radeon and the newer blows it out of the water.
Example: The 4770 plays Fallout 3 on ultra high settings -auto-set by game- and the 9800 GTX+ sets it to High.