Yeah.. the fastest you can afford!

Opengl and Directx are the two main 3d drivers currently being used, so you really want to use one of them, if its available.

You can even buy a videocard 2 years old that has opengl built in, and it would be much better most likely then screed, because your cpu is no longer doing all the work.

I always recommend buying last year's latest and greatest video card, because it'll have dropped in price in a year to make it a good value.

Way too many people take way too many things way too seriously.