I've heard good things about both 44.03 and 43.45 for 4x00s. I use the 43.45 for my ti4600, and on top of running even newer games like Far Cry flawlessly, they don't have some of the glitches I experienced with the latest drivers, most notably the 56.72, and give me a 1500 point increase (which, in my case, DID translate to faster running games) in 3dmark'01 over the 56.72.