Adding a controller is just hauling one more piece of gear (plus cases, wires, stands etc.) to do something that a slightly larger keyboard in the first place would make unnecessary.

Just remember... you got used to the FSX because you now have one. You'd get VERY used to a 76, and all the possibilities they open up (remember, it ain't just about piano... how about three sounds with enough range to actually USE them? How about Rhodes or Wurli's full ranges..? how about an arranger section AND a full 61 for Hammond smears and dives?) if Yamaha made one that was any GOOD!

Never say never!