I disagree with hunt3r here....for some reason, Powercolor strikes me as the cheap brand. I would go for Sapphire(obviously), HIS, MSI, Asus, Gigabyte.....I would go for Powercolor only as my last option.
I remember when I was thinking of buying a 9800Pro, the powercolors were more easil available, cheaper but also lower clocked. Somehow that really turned me offf.....
And I had read a few reviews of Powercolor's bad build quality.
XFX too was the same but at least they have improved a lot. There is nothing to suggest the same thing has happened with Powercolor.