That cab is prime for a MAME cab! It's not as bad as some make it out to be! With a little TLC, some Bondo & a bit of effort, you'll have a great cab.
Just an idea on the damaged corners.. Happs makes/sells a metal corner cover/protector that will cover up most damaged corners. Here's a pic:
Cabinet Corner Protector*Sturdy steel reinforcement plate keeps pressed wood from coming apart when moving
*Also used in the repair of cabinets
*Round corners protect walls, games etc. from damage when moving machine
*Round corners make moving the cabinet easier. Slides over uneven cracks, bumps, etc.
*Complete with hardware
*Made in the U.S.A.
Part Number: 49-0570-00 $5.20/ea.
I used several layers of Bondo on my cab corners and they turned out great. I peeled off all the old graphics and recovered my entire cab in black Wilsonart laminate (formica). I bought my laminate from a Wilsonart distributor (they sell to contractors) and was able to purchase by the sq ft. I had much less waste and it was about 20% less in cost than buying from Home Depot or Lowes.
What are your plans for a monitor/TV? You have a JAMMA harness (although cut off) already in the cab, so you could possibly put it to good use.
I'm still working on mine. I got a bit delayed due to hurricane Ivan though.
Best of luck and keep sharing the photos of your progress!
Scott