At the moment I think some decent ones are still in development. 27.20s, 27.42s, 27.51s and 27.70s all will run it. I preferred the 27.42s with my last card (GF2 MX 400).
I have a GF4 MX 440 now and I'm running Leadteks own drivers for it seen as it's causing big problems for my machine.