I'd recommend 28.xx drivers. I found the 28.32s to be the best for my GF2 MX400 64MB. Some people find ones a little older or a little newer to be the best for them. Try them and see which ones work best for you.
23.12 ( W98/ME download ) seemed to be the version that worked the best with my GF2. I don't know if it could lead to problems when playing newer games though...