I want to replace my aging Dual control XTR 965 shifter/brake lever. I am thinking of getting either Avid Elixir CR's or a version of Hayes Stroker Brakes. Which would you guys get and why. It looks like the Avid's would be much easier to bleed, but I really don't know. I am also looking ate getting the new XTR Rapidfire shifters. Are they compatible with the older XTR 960 Rapid rise rear derailleur?