I decided after working on my MAME cab to get a cabinet that could run JAMMA boards too. I'd originally wanted to get or piece together a Shinobi cab, but realized that with a JAMMA adapter for Shinobi I could use any JAMMA-wired cabinet and be able to swap out games occasionally. A side-effect of this is that I can run JAMMA games that are newer/3D and that MAME doesn't handle very well. Mr. Driller 2 stays in there 90% of the time (my wife is addicted to it). The PCB you can see where the door fell off the front of my MAME cab is Soul Edge v2.
I bought the cab from a local distributor for $100. It's a Primal Rage cab that had been converted to Tekken 3. Going down there I expected to pick up a generic 19" dynamo cabinet. The atari cab's a little funkier, but the 25" monitor was a bonus and all the electronics are still on a pull-out drawer behind the control panel. I made a new marquee, but so far I can't find an overlay big enough to cover the giant metal control panel. The kick-panel graphics are on a plastic material very similar to the control panel. I haven't found a good way to get them off without damaging the laminate underneath. It's kind of ugly right now, but it works.
Sometime this year I also plan to buy or piece together a 4-slot neo-geo cab. I think that's about all I have room for.