I've sold the 5D III with the L primes for the Fuji X-T1 out of portability reasons. Got the 14 2.8, 23 1.4 and 35 1.4 for it and a Samyang 85 1.4 which is a breeze to focus with the amazing EVF.
I didn't test yet how the X-T1 works with the current Lightroom 5.x but when using my 4.6 back when I had the X-E1 you really have to change the workflow, especially when it comes to sharpening. When printing you probably won't really see a difference, only when pixel peeping.
To be honest I use Lightroom way less now. Most pictures go via WiFi to the phone/tablet as 3mp JPEG, get a wash through VSCO Cam and uploaded to Facebook/Instagram/wherever. If I ever shoot that Pulitzer picture or want to print it big, I'll be more careful on the post-editing.
Edited by Szeph el raton - 12/3/14 at 8:35am