Hi, I am in the process of setting up my first MAME machine and have started with the control panel. I have read lots of usefull posts and I am leaning towards a (2) player setup with 8 way joysticks, 6 buttons each (other misc buttons 1-2 players, possibly some pinball buttons and credit buttons). Also a trackball for games such as centipede. My question is regarding the addition of a spinner and 4-way joystick

I know the spinner is useful for games such as missle command, but
can I get a way with using the trackball ? Also on older games that use 4 way joysticks I was thinking of just adding one on player 1 (wired to the 8 way)....can I get away with an 8 way. If not is there any 2 player games that need a 4 way also ? I am trying to minimize the amount of controls but maximize the amount of types of games that can be played. Thanks in advance.