I am someone who tries really hard to stay in that camp but sometimes the urge to 'just see' becomes too strong, particularly with 'il2'. Unless there is a compulsive reason for doing changes however, I now stay away from stuff like nHancer etc. as there is very little gain with a good graphics card, a good processor and plenty, ie 2 gig, of RAM. I have tried many settings with different cards over the years but still tend to come back to the same ones because instinct and my eyes tell me it looks good and runs fine.
The monitor drivers are a good move though as, with them, the equipment is using the software it is meant to have as opposed to the generic Windows stuff.