The last ATI card I owned had absolutely terrible driver support. I had to quit playing CSS for almost 6 months because my drivers crashed Steam.exe. How I couldn’t begin to explain but when I went to Omegadrivers the problem went away.
The frequency of driver released shouldn’t be any measure of greatness as a good driver doesn’t need updating. In the past, the more frequent the updates the more problems it had. Rare exceptions are for new features but at this point there isn’t much they can give you that you don’t already have, feature wise.