I have a sit down (cocktail) Ms. Pacman game that I converted w/ a new screen and a card. All I ever play is Donkey Kong. To me it's the best (and hardest) video game. When I have a great game, I'll get over 150k.
The guys on King of Kong were going near a million I think (or over it). BTW - it's a must watch documentary if you haven't seen it.