3d accelleration support

I'll admit that I don't pay super close attention, but it seems to me
that there's a growing trend among the top 3d chipset makers to provide
their own proprietary accellerated drivers for XFree86.  ATI and NVidia
are the two examples I can think of, and it seems like they're the best
3d chipset makers.

I'm still using an older 3dfx Voodoo3 because I know that the full
programming specs are available and I can get open source accellerated
drivers for it.  If I were to replace this card with another 3d card,
what would be a safe chipset to select if I want to stick with
open source drivers?

Thanks.
noah

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