I bought GenMar risers and am quite happy with them. The come with a longer brake line which is a good time to change your front brake fluid.
These risers alow a much better posture/ergometrics for long rides. I also added Suzi crash bars around the motor with cheap front pegs which are great for leg relief, especially if you're wearing a road suit/armor.
I've looked at FJR's, Concours etc. and they all trap your legs in bent position with no relief.
Dam Snow up here in Ontario.