In your case, you would be better off with the ATI Catalyst 10.5 drivers as you are using a modern GPU supported by current drivers. Catalyst now lets those who want to OC do so (wasn't always like that and was one "feature" in Omega's favor). Now if you were using an older GPU (like the old Radeon mobile GPUs used in some older laptops) and wanted to get more out of them, you might use Omega drivers. Bottom line, for you, use the ATI drivers. HOOAH!!!