Of all the bindings with full urethane highbacks the RK's are the most useful. I think you'll be better off with TT30's anyway. They'll be plenty capable on jibs and jumps at your small hill and then you wont be limited with your limited time on a real mountain.
Now, about that Skate Banana...
Go ahead, drink that kool-aid.
FS: Forum Sauce 142 $200 plus shipping
FS: Flux SE30 $75 plus shipping