I was looking into Shimano Groupsets or Partial (5 piece) Groupsets to upgrade a Specialized Diverge Elite. I understand that I could use parts from the 6700 Ultegra series 10 speed parts. Given the relative scarcity of those items I was searching around for new parts. I'm generally considering wheels as a separate upgrade and am looking to avoid not have to buy a new set of rims/tires.
Will a Shimano 6800 (11 speed) full groupset with hydraulic brakes work on the Diverge? Would a 5 piece set like those sold by Colorado Cycle work?