For me it was a moment of one of these things is not like the others. When 80% of your list is modern and you are going to offer a WWII vehicle the Churchill does not normally come to mind. But think again, I had a co-worker who was British and he had served in the Army post war (national service?) He was assigned to an engineer unit and they had Churchills. While I am not sure of the variant I want to lean towards the Kangaroo as he talked of it more as a taxi/truck than a specialized piece of engineering equipment.
As of today the vote is close with the M-1 @ 25% followed by BMP (24%), Churchill (19%), T-72 (18%), and the Challenger 2 @14%. Take the time to let Osprey know what you want to see next by go to their home page. Remember those WWII gems severed on for a long time afterwards and have a place in many a Cold War army.