GTX 460 on 64bit system. Which drivers have you found to be best?

I was using 270.61 for a while until i started getting a weird line across my screen. So i'm looking for configurations to fix it. So far thats the best one i've used asides from that...(ie, runs smooth on higher settings)

P.S. I've tried enabling Verticle Sync to fix what I believe is screen tearing of some sort....No luck.

I use:
60gig SATA SSD
Phenom II x4 955 BE
4gig ram
Nvidia GTX 460 OC


which drivers have you been using?
Results, comments and suggestions are accepted. Post system specs as required.

275.33 is the current version; when I am full screen I have to force vertical sync. Other than that, flawless.

EDIT:
I suppose I should clarify that is Vsync forced in full screen, 1080p, 16xQCSAA, no AO, everything else on/high except GDQ, which is 8. This is on a 768mb GGDR5.

With drivers 275.33 I'm running fullscreen 1080 (v-sync needs to be forced on), 4x aa, 8, 3, Shadows Lowest, Texture Q High, Texture F Highest, and in game shadows and dust turned off.

Edit: I guess I should mention this is on 2x SLI GTX 460's 1G DDR5