This is exactly the sort of kit that attracts and excites me. Although I would only ever need "one" on the gaming table at a time (I play mostly infantry games, with one or two vehicles in support), I love to have options, and just based on the diagrams above, I can easily see my getting three kits. One to assemble as the twin-turret, one for the single turret, and one for the later models with the sloped armor. Not sure I could justify getting a fourth kit, so as to play around with a command tank version. But I might.
And this is one of those tanks available in HUGE numbers in the early war years. As my form name suggests, I prefer early war, so around 1943 I start to lose interest. But this beauty will definitely be part of my soviet forces when it becomes available.