Wizardry 8 - Since a lot of people here seem to like it, I checked out the demo. It is turn based, so that mitigates some of the things I don't like about the first person perspective.
Baldur's Gate 2 / Neverwinter Nights - I didn't like the controls
Empire of Magic - haven't tried it;
GameSpy.com's review isn't very flattering.
Download the demos, and check them out. You may find one you really like, or at least narrow down your choices.
