The CZs are fine pistols, if they fit your hand, get one.
There is no difference between the 75 and 85 other than the ambi controls - if you're right handed, they don't matter. If you are thinking about competitions down the road, for an extra $70-100 you can get the '85Combat' model, which has adj sights, extended mag release, trigger overtravel screw, etc - nice things for target shooting. I had 4 different CZs over the past 10 years, including 75, 75BD, and the 85Cs. All nice guys. I had some problems with feeding and jams, but I think those were mostly magazine issues.
Ohhh, don't get the single action model, go for the old reliable SA/DA ;-)