I think there are enough, but I really love analog games. A couple things that might weight you one way or another:
- Are you going to play 270 driving games on this cab as well? If yes, if adds quite a few great games.
- Are you thinking of playing lightgun & positional gun games? Same as above.
- Is it going to be a plain analog stick, a flightstick, or an analog stick with a top button? Some games play better with one type or another.
- Are you going to add a spinner to that CP? There a few games that use spinner + joystick, and Mame currently has a pretty good analog2digital convertion, that's adjustable with the -joystick_map option. Depending which type stick (see last above), adding the spinner could increase the number of games.
- Do you already have a digital cab? If not, your "analog cab" could make a pretty good one player cab, depending which type of analog stick you have (with mame's -joystick_map option). OTOH, if not, there are a lot of 2 player digital games that a 2 player 6/7 button cab would cover better.