I'm looking to replace my Nexus 8 with either a N360 or an Alfine-11. The bicycle I'm going to be putting it on is over 50 lbs unloaded, regularly hauls 25-35# of groceries, and I'm planning on getting a cargo trailer for it. Most of my area is flat, but there are some doozies - 10% grades for a 1/4 mile or so. Which hub would be best? I don't think my bike could take disc brakes, so the braking systems available aren't a factor.