The reason I use the omega drivers is because I actually have a ton of problems with all the official releases from nvidia... have no idea why though...
other then the drivers that came with my nvidia card in the first place I have trouble with all the newer ones... but I did a test before installing these drivers and using the original ones and some of the newer ones and for my pc I find that the omega drivers help me out alot more...
I got a gforcefx 5700 fe... my friend has a gforcefx5500 fe...
when doing the test for ffXI online I had low performance on the tests...
my friend had about the same performance even though his computer is faster and better than mine... 1.8ghz 756ram versus 2.4ghz 1gig ram...
after the drivers were installed my comp had a lot better performance and my friends who chose the graphics mode of the drivers had slightly better performance... when we redid his for optimized performance it still was not running as fast on any of the games we tried versus mine was close but not as fast and we have yet to figure it out... I think he runs alot more applications in the background than I do though...