Originally Posted by TJClay

sorry to get off topic but once you sit down with your trek dealer he can input crank length, cassette, compact, or standard, bar choice and width, seat width, cable colors, grip tape, its pretty much fully customized other than you're right, you are limited to Bontrager parts and you cant mix component groupsets, ie: dura ace brakes with ultegra cranks.
but I get wanting to build with your choice of brands, I was just stating another way to go.