I guess you are all right and I actually expected such answers. Just try to get my mind clear.
I guess it comes down to a combination of two primes (85L or 135L or 200L) vs. 70-200 2.8 (Sigma or Canon).
I think I have to opt out the f/4 version.
I really like the Sigma 70-200 DG, but those fantastic reviews of the Canon 70-200 2.8IS II nagging me.
Those books follow me now for over 15 years. I read them several time and find always something new. I couldn't even imagine the full potential during my first reading.
This is more than a dumb sci-fi saga.