Arabian
Excellent choice. Seconded. Make it the Atari ROM set that was used in the U.S. arcade version, though, and not the easier Sun Electronics version. I wanna see how the scores compare to what's already on the books. Full disclosure: I'm the Arabian WR holder, although you wouldn't know it since TG went down a few months after verifying and posting my score and it didn't get captured by champow or any other scoreboard. For fun, I could post my record game on YouTube after the contest is over so you all can see how it's done.
Reminder, though: you need an 8-way joystick for this. Keyboard play would be extremely tough.