Earlier in the year I picked up a 2010 Shimano SLX shadow rear derailleur for $45, from One Ghost Industries (http://www.oneghostindustries.blogspot.com/). I've been wanting to switch back to Shimano because I just haven't been happy with the SRAM stuff. Till now the cost has been the major factor along with the fact that I just did not want to switch out a part unless its broken or just not working properly. Since I had to replace the chain and rear cog with new parts, I figured it was the time to install the derailleur as well. It took a bit of digging but I found a Shimano rear derailleur shifter in my garage along with a new cable and housing. The new housing is silver so it a nice change from the black and I also found some aluminum cable end caps which look pretty trick and match the rear link. It took a bit of fiddling with but I was able to dial everything in pretty well. This thing shifts awesome now, it's so precise. I also prefer the look of the new rear mech over the old one.