Posting to make this thread back from the dead, it was that helpful to me, LOL.
Anyway, speaking of the 91.47 drivers, they were some 80 points slower on 3d05 for me compared to the 84.63 drivers. I didnt bother with 3d06 after seeing that. I also think that the 84.63's are the same as the latest stock Dell 84.69's, without the turned off NVidia control panel features, as the 3d05 and 3d06 scores between the two drivers are indentical within a couple of points. Anyway here's some numbers, and I give my recommendation for the NVidia reference 84.63's (get .inf from laptopvideotogo) based on what I found researching this stuff.
M170, 2.0, 1GB, 7800GTX OC'ed 430/1200, video set on 'performance', who knows what's running in the background...