I have used 451's on ailerons for a couple years, they were great, now I have 551's as they are about 20g lighter, and they are great as well.

352 on the rudder like Andrew, I just changed from a 9156 to the 352 and even with the lower torque rating it "feels" stronger than the 56.

I am still using 9650's on the elevators, but plan to try out some of the BLS equivalents one day.