I think dafreak's ZINcGUI is the most often updated. I know it's what I'm using (v1.9.0). It also gives you a way nicer control setup interface. What I didn't like is that it makes you configure each game. =P
Aldo's FE worked fine tho. Just a bit more limited.
Oddly enough, even tho I don't have a nVidea card, some games that were real glitchy on D3D run nicely in open GL.
The Namco games all run with no sound (not emulated yet) and pretty major graphic glitches, so if you "only" have the Capcom stuff running, you're doing okay!