Re: Best driver?
Personally, I like 186.18. It seems to have the least problems and fixed aspect ratio scaling works best for me, though I do have to add a couple custom resolutions like 1440x900 and 1400x1050. Most of the newer ones completely break fixed aspect ratio for me and all I can get is a stretched screen when not in 16:10.
That said, for newer ones, the 258.96 set seems to work well too, but the 260 beta breaks scaling completely.
I have a single card and don't use the stereoscopic 3d or whatever.