I'm running Juin Tech R1 on my Fog Cutter and they have been trouble free for over 4000 miles. I like the easier lever pull from the tops vs a full mechanical like the BB7, sort of in the middle of mechanical and full hydro. I don't have any experience with the Spyre.
I recently put on a set of Paul Klampers on my mountain bike, but don't have enough riding time to give an opinion.