They all perform virtually equal so just go for the best price from a
company you have confidence in.
Some standouts:
-Guillemot's Voodoo2 12MB is retailing for US$159! They have been
around a while but are more popular in Europe and Canada. I have
never seen one in the US.
-Metabyte's Wicked3D has incredible drivers that allow higher
resolutions than other Voodoo2's and also work with H3D's 3D glasses
with over 100 games.
For confirmation, check out these sites:
www.tomshardware.com
www.cyrellis.com
www.anandtech.com
ve3d.net