Disc brakes are a want, certainly not a need. Watch the tour today? The wicked fast descent and the rim brakes covered it without trouble. Sure, if you are super human like the pros, discs may allow you to brake deeper into a corner, but really, who are we kidding, ourselves? Drop the disc requirement and even the 11 speed requirement and your world will open up. Raise the entry price and your world will turn on its head!