Doesn't it look better with the nice white t-molding? Incidentally, I was more nervous about cutting the slots for it on the control panels than anything. I know how to use a router, but I just couldn't get my head around how it would work for this. Fortuanately, Home Depot had a slot cutting bit, and once I saw it, it became clear.
I went back and forth as to whether or not to use the arcade monitor. I wanted authenticity, but I also wanted newer games, to be able to use windows, and to easily rotate the display. In the end, the monitor got sold to someone with a machine to restore, and I went with a 19" LCD display. It was easy, keeps cooler, and uses less power.
I at first thought I'd cram all the controls onto the one panel, but I didn't remember quite how small a Donkey Kong machine is. I did some research, and decided in the end to go with swappable panels. I used molex connectors I bought at radio shack and made three panels. Here's a picture of the connections, along with the inside of the machine, and part of my feet.