my personal opinion is a chris king, people moan and bitch about them sliping all the time, this only happens if you dont look after it, i had a chris king for AGES, over a year easily, and i could count the amount of times it slipped on 1 hand! i had a bulb before that and it slipped a lot more, when people say their kings sliped all the time they usually have bikes that are caked in shite and dont get cleaned or looked after..
if not a king then a profile, i know a few people have used these, they seem pretty strong, reliable hubs to me, my first choice however would be a king all the time.