I'm by no means an expert compared to some of the other guys in here, but I have recently refound my love for the standard t-34/76.
It seems that during the last year of patches it has been both power creeped and directly buffed, so it now provides a decent and very cost-efficient counter to both german mediums as well as infantry. In my opinion you get more bang for the buck with these guys now and choosing the smaller gun will save you a lot of fuel so you will be able to rush out an IS-2 much faster.
Of course skipping the t-34/85 could beg the question whether armoured assault is the best choice of IS-2 doctrine?
