The water bottle question is a difficult one due to the carbon frame. After trying a lot of water bottle cages that did not fit, I settled on the Elite carbon for my Dragonfly. The bolt seemed to recess enough on the cage to allow unimpeded access to the water bottle. No shim was necessary. The Elite cages are also light and fit stylisticly with the carbon frame. Are you going to spend the money for a carbon frame and then worry about the price of a water bottle cage?