When I got fitted the guy said to go with a slightly smaller frame and run a 120-130 stem with a tall seatpost. Getting more of the carbon seatpost out of the frame makes it much more comfortable. And the smaller frame allows for more drop in the bars plus saves a little weight. He atually mentioned fitting the frame off the stem length which seemed weird.

That is considerig if the size smaller can be fitted properly with those constaints, and you dont have a freakishly long torso or something.