Would a screw type switcher help at all with the power requirements? It's seems to me you could run all the LED's you ever wanted to with one. You could run the led lights at 12v for a much brighter display or @ 5v for a dimmer display. @ 12v they would burn out a little quicker but the led bulbs are mere pennies in the arcade world. They pop in and out of the old style fixtures with a push and twist.
http://www.ebay.com/itm/Happ-15-AMP-...IAAOxyKsZRvz5Q