only beast of a lens that I would put up with, would be a portrait lens like a 70-200 f2.8
beyond that, I have very little interest in using. I would get the 24-70 GM over 24-70 sigma for sure, from what I've seen, sigma lenses are noisy for video and wont af as well.
I'm going to take my time a little and sell off my canon 2470 and then go from there. 24-70 vs 28-135, going to use it mainly for video... with the 28-135, I can use only that lens for all video purposes, in crop mode it gets me to ~200mm, but only f4
Sony A7rii/A7riii/A9 - FE 12-24/4 - FE 24-240 - CV 21/3.5 - FE 35/2.8 - SY 35/1.4 AF - FE 50/1.8 - FE 85/1.8 - EF 135/1.8 Art - F 600/5.6 - CZ 100-300 - Astro Rok 14/2.8 - Tamron 28-75/2.8 RXD, 70-200/2.8 VC