In the same boat as the OP. Not hitting the park...mainly groomers and some backcountry when the mood strikes. I settled on a Cobra, have some Ride Insano boots (super stiff) and hemming and hawing about bindings. REALLY intrigued by the Flux SF45. I have the Burton RE:Flex Genesis on the board now (have NOT ridden yet)...grabbed some Union SL and really found the toe strap issues to be pretty glaring. I saw some Flux ratchets on the TTs in REI and they seemed comparable if not better than the Burton ones.
So...curious to see/hear feedback on binding matches for that series of boards.
Any reason you don't want to use the Genesis?