I think before I bought anything, I'd want to get to demo them on real grass, and during the spring growth rush. It's a lot of money to spend to find that what you bought isn't quite what you'd hoped for on your properties. I don't know how tall you are, but I'm 6' and the TC is way too small/tight for leg room and overall comfort for me. The Cheetah is better, and the TT is far better.
I assume you've sat on all of them, but it's not quite the same as actually operating one under real world coonditions.