For those of you've that aren't sure as to which ATI drivers you should use Dark][Tweaker has thrown up their Catalyst 3.6 vs Omega 2.4.74 driver report. You'll be surprised to hear that Omega's Drivers beat the Catalyst's 3.6 drivers in the 3DMark2001 benchmarks! I haven't used google to translate the article as I'll let the benchmarks do the talking.

Catalyst 3.6 Vs Omega 2.4.74 Report At Dark][Tweaker