My best advice is for you to TRY all of the most recent blends. On my Dell laptop, the standard ATI Catalyst drivers wont install (proprietary Dell crap..), but the Omega drivers install without a snag...
Install a driver series, then test them with a synthetic benchmark, then use the computer for a week, and if you experience graphical errors, bug and BSOD, well uninstall and try others. You can also judge with a "seat of the pants" feeling... highly unscientific or qualifiable, but it works

BTW, if a newer version driver doesnt work with your system, dont be afraid to use an older version. That happened to me using the newer omega radeon drivers on my laptop, I had to use older ones....
Cheers