You guys are forgetting - the M1 has 505 Gallons of fuel on board. Yes, takes a lot to fill up, but what other tank can you run up into the local civi's garage, find some paint thinner, some vodka, and it can run on it?
That is what it is designed to do - run on anything decently flammable.
Stick that in your Leopard! Gonna cause you much headache!
Aussies made a wise, but expensive purchase. Of course, the extra 18 tons of weight will do wonders for your black top! I guess if you are on a budget, a Leopard will fit the bill.
-S