I didn't want to go with a MAME setup right now, because I've always wanted a dedicated MK cabinet and to be able to put all the games in one machine is even better. The thing too with MAME is the sound that bugs me, there are MK games out there that do "crackle" from time to time and to me, I'd rather just have the real thing if I can get it - which I was lucky to find locally.
Only thing I need now is a MK4 board - anyone have one to swap I just got my 2nd UMK3 board today and will trade it for a MK4