I have over 15 years on knee mills of verious orgin, everything from and Enco Belt drive to a Bridgeport EZ Vision (3 axis CNC with an R8 collet). Enco's are fine, and the variable speed is a huge plus. Just know you lose some power with a phase converter, about 30% IIRC, but I've rarely needed all the power available in 15 years.
My current mill is a Bridgeport EZ Track 2 axis, probably the best balance of quick set-up and capabiltiy. But its at work, I'd love to have your mill in my garage!
One day...
Have a good one.