All I can say is that on my system, the 30.82's are the most stable. I have NEVER experienced an increase in performance
with the 'latest detonator drivers'. I have a gf 4 ti 4200, and
have the same drivers that came with them installed.
Goto Start\control panel\display\settings(tab)\advanced(button)
\gf 4 440mx or whatever, your driver version should be the
last 4 numbers in the list of driver files' details.
ie mine is 6.13.10.3082. And my drivers is 30.82.