Go for some of the leadshine M542's, they are cheaper and better than the Gecko drives and if you do get trouble you can get a replacement fast.
If you fancy going the Kflop route, contact me as I have a brand new board here, never fitted to anything.

The leafboy board is a BoB and not a motion controller. They are very good. Sieg have been fitting these in thier KX series CNC mills for about 5 years and AFAIK only one failure which was a wiring fault anyway.