I have a Crystalyte HS3540 and will be using an A123 battery from Cellman (66v, 13.8Ah). I want the install to go as smoothly as possible since this is my first ebike. I'm thinking of ordering a controller through Cellman too (Infineon 12FET 40A) but am I setting myself up for issues with having to match connectors and do a lot of rewiring? Would I be better off with a Crystalyte controller, or Lyen? Plug and play would obvoiusly be preferred.. I'd like to plug in the throttle, battery, 3-spd switch, motor, and ride off.. is it that easy?

Please let me know which controller I should be going with..
Thanks,
Ryan