Three lenses? Yeah, I'd freak out, and quit shooting...otherwise, for video and stills, 17 TS-E, Zeiss 50/2 Makro-Planar, Zeiss 135/2 APO Sonnar...and a 1Dx Body.
Why use a 1DX body for manual focus lenses? Doesn't that defeat the purpose of having 1DX? Why not a 5D3 instead? With ML, you can get some very good raw video aside from high resolution stills.
I don't like any of the 5 series bodies - too small and too light. The heavier the body, the more steady I can hold it. Notice the "Hasselblad"...I shot a 203FE with 110/2 and 180/4 CFE handheld down to 1/2s. I like the weight, it makes it nice, even after shooting 8 hours. That, and I don't like the mode 'dial' and layout, detachable grips, and other things about the 5's. I also prefer the larger battery and gigabit ethernet of the 1Dx. I also like that I can share my accessories with my 1VHS when needed for B&W work. I shoot tethered a lot, but sometimes do require high FPS, just not focus tracking. If I needed autofocus and was restricted to 3 lenses
, I'd probably have a bunch of Contax autofocus N lenses converted by Conurus.
I could care less for video...if I did, I'd shoot motion picture - Arri Alexa is my choice if I have to do that. That way, my 3 lenses would be PL mount Zeiss Master Primes - I don't like focus breathing. I actually would like a 40mp 1-series that didn't have any video functions - probably why I'll end up changing systems to Hasselblad H.