I am going to answer the question asked in your topic rather than the one asked in your post
Hope it helps anyway!
I have not been through many groupsets yet. My first gruppo was some real old Shimano bits that were replaced by a more modern (at the time) Shimano 105 5600 group. This group stood up to all the abuse i could throw at it including several full winters with 10+ hours a week. I then decided to try something new and went with the Ultegra 6700, shifting was nice so was the braking. No HUGE improvements over the 5600 and i didn't like the feel of the levers much. I decided to change it after both brakes seized up after a couple of months of winter use.... And that was with everyday maintenance and care, maybe just bad luck...
I then decided to try out Sram and went with full Rival except for the crankset as i already had a Rotor 3D installed. The change to Sram was partly due to ergonomics and not because i felt that Shimanos components weren't up to the task anymore. What i am trying to say is that ergonomics for me is the most important thing when it comes to groupsets. They all shift well, some slightly better than others but none will be unable to move the chain from one cog to another.
I would suggest you go ride the groups in contention, preferably with a bar shaped like your own, and make your decision based on what you like and don't like. The 9000 group looks sweet though!