I switched out the BB7s on my Disc Trucker for TRP Hylex, and couldn't be happier. The shape of the hoods is much better, and the braking is perfect, quiet, light pull. I have Spyres on another bike, and I like them better than BB7, but they are not nearly as good as Hylex.
As others have pointed out, you are kind of comparing apples to oranges with the Hylex and 785, since the Hylex is just road style brakes, the Shimano is brakes and shifters combined, so you would have to go to that type of shifting, or I guess just have unused shifters and flexy brake levers.
The Hylex is the only drop bar hydraulic brake only system I could find on the market except for a SRAM model that only comes for the front (for single chain ring bikes).