I recommend you get the avid, i run one with an xtr lever and have done so for about 6 months now and it works amazing, good bite, lock and modulation. The best thing to do is bed them in with cold water and high speed sharp braking as this ensures best performance. I havent had one problem with mine (touchwood), they are fairly low maintenance. I have had a go on my mates hope disc and i prefer my avid, i think its because his brake wasnt set up properly though, so not really justified. :P