35 is my favorite focal length, and I own the 35GM, Sigma i35, FE35 and TT Artisan 35 f/1.4 MF.
Their frequency of use is in that order, with the FE35 and TT Artisan having no love over the past 18 months.
FYI, you will find that with any Samyang optics, including the AFii series, focusing on even slowly moving subjects, particularly people, results in a very low focus hit rate in AF-C. With an A9iii... The difference in accuracy between Samyang and Sigma is startling. So if you plan to do street or even event photography, I'd stick with Sony or at least go with Sigma. Don't know anything about Sirui, other than based on my experience with their tripods, I'd never buy their lenses, but that is pretty unfair and biased.