I have a CNC'd RF45 bedmill and I used a CNC4PC C11G board to build the controller around. It has been a very good board for me and despite my many ham fisted attempts at burning it up it is still kicking. I had run my spindle with it previously but I have since converted to using modbus for spindle control. The board is easy to setup and the on board outputs seem to work well. I have yet to hookup my coolant relay but that is just pure laziness. Personally I like the board and like the simplicity of the wiring and that everything is on the same board. Arturo has been helpful with information about it altho he can sometimes be slow to respond. He has always gotten back to me tho.
There are some on here who have bought the new C11T board that have complained of problems and apparently the new board requires dual power supplies. I cannot comment on that new board but as I said my C11G board has never let me down thru a couple different variations of setup.
I do not know your budget or your aspirations for your machine, but honestly If I were to do this again I would probably not go with a gecko based setup. I would most likely go with one of the more or less plug and play AC servo setups available today. If I add up all the money I spent on the three Geckos, the BOB, wiring, and motors It would have actually been cheaper to go with say the DMM AC servo setup let alone the simplicity of the system. My setup took a lot of time to tin and and properly hookup wires as well as all the many considerations of where to put components and how to run the wires. The DMM setup is more or less plug and play and seems like a good setup let alone the power and speed should be better and the longevity of a brushless AC motor over a brushed DC has got to be worth considering. If you want to save some money I would also consider going with Hoss's setups for that machine using stepper based systems. Good luck with your build...peace