Santafe158,
My comment was directed to this:
Bill Nielsen posted:... but I would stay clear of the MTH Z-750, because it's voltage is too high for the LionChief electronics...
Which suggests that the z-750 has a different output voltage than the z500 or z1000, something I'd never heard before.
I would agree that an 80 watt transformer is about as low as you want to go, and bigger never hurts, if you can fit it in the budget.
JGL