Well, that depends on what you mean by non-functioning.
For example, if the monitor is OK in one and the game doesn't work, then it would be a snap to convert to mame.
But, if the monitor was bad and the game board still worked, well then that would be a problem for getting MAME going.
For aesthetic reasons, I would pick the MKII, since Raiden is just so bad ass.
but then again, NBA Jam comes with a wider control panel and is ripe to have a new top made for 4 player games.
To me, the NBA Jam artwork just looks like a commercial on the side. Raiden is a work of art, even if it is just a picture of an actor. But some people really go for the sports look.
hmm, don't know how much I'm helping, kinda rambling here.
