Hi
That would all depend on what you ultimately wish to do with your machine.
If you just want a gfx card only and aren't much interested in additional cards, the bvision is not bad, but 3D performance and features is below the Voodoo3000.
If you want to add additional cards in the future, it would be best to get the PCI board now and get a gfx card to go with it. No doubt PCI voodoo cards are inexpensive these days.