Takeuchi all the way man. They are the sh!t when it comes to track loaders. The Yanmar engine are a power house, and these things will float on mud and grass. I have a bud in NC who works for the family business that builds ponds. Right now, they run a Tak 150, and he can push some serious mud with it, not to mention floating over it.
And the track system is awesome!! You know how much just one side of an ASV track set costs, over $6,000!! The roller's themselves cost a ton! Sure, their more comfortable, but the Tak design is much simpler, and easier to replace and repair, and cheaper. Around $4500 I believe.
Plus, these things can lift some serious weight!! They can lift an awesome amount of weight, and they can push at least their own weight, plus more.
The joystick controls are nice and precise, and I really like their taller seats. (i know, it's odd, but they are some very comfy seats)
And one other thing, I know some of you like to go back to the original company that originally made the machine design. Well, Takeuchi was the first company EVER to create the tracked skid steer loader, so they know a thing or two when it comes to designing them.
Since you're looking for an 8000 class machine, check out the TL130, or, if you're buying new, go for their new TL230.