Hands down the winner is Wolfman!
Ive been on the road for nearly 3 years now and in those three years, Ive only had to replace one buckle that got sun damage on my Wolfman bags (and a couple i broke by squeezing through things!). However, I love them. I have the roll bag, expedition pannier bags and the tank bag.
On my first trip, I used AndyStraps but they didnt last more than 6 months. They came apart at the stitching, I was forced to sew it up every second day.
For more information on my adventures, please visit either of the following: