About two years ago there was another Neo Geo thread, and this was posted:
Looks like a NGCD just gutted and turned into a CMVS, actually looks pretty nice.
i've posted my unit here several times and as others have also suggested, get one of these consolized MVS units. It's an arcade board built in a convenient shell with proper input/output options.
Runs for about 300$ as a plug&play unit. Much cheaper if you get just a board and build it yourself.
Games are 10$-300$. Thats cheap compared to AES home console games, 50$-1000$
Looks like a NGCD just gutted and turned into a CMVS, actually looks pretty nice.