Yep, my Leo 1 is just incredible, the most responsive tank by far, but the T-72M1 is no slouch.
Honestly the Chieftain is cool due to its shear size and weight, the ground literally shakes when she moves, but its really kind of a big, slow, behemoth. It sounds cool, but the mechanics are not nearly as tough as Russian, and not nearly as advanced as German or Swiss. Not as easy to work on as American or Russian, and lots of extraneous "stuff" in the way of operating systems. It is cool, but not nearly the tank some of the others are. However if you want the biggest, heaviest, and latest tank widely available to the collector market, she is the one.
I haven't heard from Greg in ages, I'd love to add his BMP to my collection, he did a full restore. He is a great guy too and KNOWS his armor!