I have to once again replace my middle ring on my XT crankset, and am probally going to replace the granny this go around as well. It's either going to be Salsa or RaceFace, anything other than Sh*tmano, as those two are readily available in my area. Has anyone had experience with both? Which shift better and which last longer? If they last as long as my chain and cassette they both have Sh*tmano beat......