As much as admiting that another US unit should be added makes we want to hurl all over my keyboard, I think the Sherman is a likely contender solely based on the fact that it has a AA gun. the T34 would be a better tank but it has no AA gun, I think that this fact alone is going to be a limiting factor governing the adaption of all future AH vehicals.look at the M8, the Puma is a much better AC but it has no AA gun,theirfore we get the M8.
M24 would be cool though.
How about a Firefly, instead of your run of the mill Sherman?