You can just play all the old original arcade games on your computer. This works just fine for most games and you would be playing the original rom just as it was in the arcade.
I know the idea of playing at a full standup arcade cabinet is cool and all, but for those addressing the WAF or space limitations, playing on your comp is good enough and won't cost anything.
One issue is playing games with special controls like Robotron with 2 joysticks, or Tron with the gun trigger joystick and spin knob coptrol. Star Wars is another or any driving game. You can buy many different controllers out there (at a fraction of a full size mame cabinet) to play most of your favorite games the way you played them on a full size cabinet.
