Congrats on the cab!
You first major decision will probably lie in what you want to do for a monitor, this will dictate what route you want to go with on a number of things. You can either go with a real arcade monitor, or mount a TV or computer monitor instead.
If you go with a TV or computer monitor, I recommend going with an LCD. They are cheap enough, lightweight, and look nice. Mucking with a tube TV isn't quite worth it anymore. Also, a nice perk is you will not need to worry about that broken power supply, because you can just go without it completely. You will just need to find a different way to light your marquee.
If you go with an arcade monitor, you will need to worry about a working power supply, you will also need to worry about getting a special graphics card to translate the computer video-out into a VGA resolution that the arcade monitor will read. If you are going for the 100% authentic look feel, it is worth the effort. Also, if you are planning on having the option to use the MK1 board, you will need the arcade monitor as well.
I second the pics vote. If you can, post a few pictures of the cabinet. Who knows, you might have a rare cabinet on your hands.
