Ozymandias_KoK, I was trying not to be pro or con about glide, but trying to be con-3D3.
From my very limited experience, OpenGL looks to be very heavy duty, where Direct3D as it's current state can be as good as Glide in a 3DFX environment.
I vote for Direct3D, as it's the standard today for the target platform.
However, I understand that I'm not asked, there is no such election:-)
Using OpenGL to help some future - maybe - port, is not a good idea, if that OpenGL is so bad that it looks it is.. I wrote 1 fps, but it was more like 0.1 fps

. Opinion based on Desert Fighters Beta, VoodooI and Pentium Pro 200.
//paarma