The new 9000 stuff looks really nice. Not a fan of having to get new wheels though (have some sets that can't be converted to 11).
I've been on Campy for YEARS... with a small dabble into Sram. Love Campy stuff and my wife still rides Campy on her road and CX bikes (yes, campy 11 for cx and it works perfectly).
Last year I switched my road bike over to Ultegra Di2 (with DA brakes and crank), with the anticipation of running in on my CX race bikes in the fall (I wanted some time on it before the CX season). All I can can is WOW. As much as I love Campy... the Di2 stuff is so much better it blew my mind. It really became evident in the CX season when I didn't have to adjust a der, replace a cable, etc all season long. Also, shifting didn't degrade over the course of a race due to muck buildup.
I would at least think about getting the Ultegra Di2 shifting parts, combined with the 9000 crank and brakes. Going witht he new internal battery will make it a nice clean setup
That said, I have a friend on 9000 mech and it shits VERY well. The hood shape is also more refined, along the lines of the Di2 parts.