The Omega driver is surely better than the one you have been using.
The resouce says that it contains optimizations, extra features (like OC capabilities), more resolutions and internal tweaks that can give them the edge in a gaming enviroment over the normal drivers, which are often tailored for synthetic benchmarks. Besides, all Omega driver sets are tested to ensure maximum compatibility and reliability.
If you wanna give it a shot, here is a link for you to download:
http://fileforum.betanews.com/detail/Radeon_Omega_Drivers/1086739971/1