I am rebuilding a 1984 Specialized Expedition. The idea is to upgrade everything and build a nice touring rig with current parts. The frame is spread to 135 to accommodate Shimano 9 speed. I have an XT M771 crank (48-36-26) and an 11-34 9 speed cassette. I want to use front and rear XT derailuers, but with so many to choose from, I'm not sure which are the best choice. I will be using Dura Ace 9 speed bar end shifters. For the rear do I want high or low profile? Top or normal pull. Same for the front. I'll assume bottom pull and 28.8, but that's a guess. Hoping you guys can point me in the right direction. Thanks in advance.