Ultimately Authenticity must mean something to me. Looking over my parts list:
Tron Stick and Spinner
2 SNK LS-30's
Happ 3" Trackball (and I actually did consider getting a 2 1/4" one also for centipede - but that seemed to be overdoing it)
I want to eventually pick up some Wico Leafs, but went with P360's as they seem well revcieved, and won't click like microswitch sticks.
Also have some GGG top fires.
Authenticity also shows up in the design I'm planning to use - Obviously that's one frankenpanel I have going for me there, except that I plan on trying to have a go at duplicating (mostly anyway) Frostilicus's rotating CP, so as to reduce the clutter, and look more like the originals. I will definitely take the time to do custom artwork, backlighting, and hopefully score some volcano buttons for the finishing touch.
My goal is a cab that the average person would look at and think it's an authentic cab (why else put a coin door on a home machine?), and hopefully play like one too.
If I was only concerned about the control aspect, I would just build a CP.
/ramble