easy if you want the arcade look and feel { cabinet } plus the cheaper games then go with an mvs . if you want to play on a tv or dont have the room fora cabinet then aes is for you , you can run a phantom converter to play mvs games but they cost somewhere around 200.00 , so if you factor all the prices in you might want a cab instead ? It can actually be cheaper depending on what aes you get and from who .
lots of good info on all things geo in the links section .