Ive always used 'scott pederson' self energizers with koolstop pads on the rear, correctly set up, they are fantastic, the forward moving action as they pull in towards the rim is like no other cantilever brake.
On the front i use 'avid' tri align cantilevers, again with koolstop pads, if i put my weight back and pull on the lever, it will skid on the front wheel..
The koolstop pads i use, have the stud off set, i reverse the positioning. they work so much better.
Ive used this set up for years, in all weathers and conditions..
Back in the early 90's, the bike shop i worked for got hold of an early set of 'suspenders' upside down forks, these came supplied with a rear 'bullseye' hub with a special fitment to take a fully floating 9" disk. and was hydrolic, but used a cable so as to use a standard lever.
I used these forks for 2 weeks, the fork was brilliant, but the disk gave me no feedback to the lever....
Straight back to cantilevers for me...., but thats just me...
Plus side to V or cantilevers, they will always be able to be fixed, no matter where you are in the world...
Happy trails