I recently went Centaur everything except for the brake levers/shifters, which I went Chorus. Why? Because for 2007, the Centaur shifting for the rear only allows you to "dump" (shift up) two gears at a time (Centaur used to allow you to dump multiple gears at a time...but for some reason they changed it). I like having the ability to go all the way down the cog! Just something to think about!