Tokey,
I'm sure you will find plenty of links to other Frankenpanels around here, but a Scientific America article on this guys cab 
http://sparhawk.sbc.edu/MAME/cp_final.html is what got me into this hobby, and to me it's a decent looking compromise.  Now he only has a two person layout, but with a bit of tweeking I think you could get 3-4 on there.  Then again I'm going the other way with my resto Dragon's Lair machine and only making it into 1 or 2 player cp, so the choice is yours. 
By the way I think there is a few other members from around here up in your area who occasionally have cabs for sale, you may want to do a search here and see what you come up with.  I was even thinking of heading up there for one a while back (I'm in central Wisconsin).
Good luck with what ever you choose,
John