You're coming from a Honda Shadow... I don't know if you've heard or read this before, but you should probably read about the Master Yoga Riding Position. When I got my FJR, I fell into this posture, naturally, but I still had complaints (a set of handlebar risers cured my ills). I wasn't transitioning from a cruiser, but many who do have problems adjusting their 'seat' to be comfortable. The FJR is more comfortable to ride than any cruiser, for the majority of folks who spend a little time on one. For a few folks, sitting 'up' instead of 'back' never seems to work, and cruisers is the way for them to go.
In any event, you may find problems with your position, as you put miles on the bike (I hope you don't, but lots of folks do). The fixes are mostly simple, and posture is the primary one on the list. Risers is next. Seat mods or changes seem to come in 3rd (I found I didn't need one, myself).
Once you adapt to the bike and adjust to its performance, your brother on his BrokenMotorWorks will be trying to keep up with you. He'll be looking to get rid of that lemon, for an FJR.
Best of luck with your new bike.
