Hi Brian,
Andy Beall is posting a pretty good overview for current VR technology components on the market at his page
http://www.psych.ucsb.edu/~beall/vrtechcomp.htm
A selection of nVidia (
www.nvidia.com) based cards are recommended there.
Keep in mind that you'll need a twinview (n-view) card with two monitor ports (monitor and TV does NOT do the job) to support stereo viewing.
Matthias