Howdy!
I only recently acquired my TC29D, and I, too, debated between Orange and Green. To be honest, though, there aren't too many Orange fans around here, so those kind of fell out of favor for me as I was looking.
Basically, when it came down to features and price, the NH was a better buy than the JD. Now, the JD is a direct-injected engine, which is a more efficient diesel, and that gave me a bit of pause in the whole debate. But it was much louder and vibrated a good deal more than the NH, and in the end the NH was simply cheaper. All else being pretty equal, choice made.
As for the TC29D, I'm quite impressed with what this little tractor can do. Truth be told, it works much harder on my 3 acres than on my 58 acres where it simply mows [and goes like the wind at that]. I've got alot of loader work here on the 3 acres, with super rocky soil and a constant, sloping grade, & she's always "sweating" her way around.
Basically, I've found the engine & drivetrain to exceed the limits of traction more than anything else. I use Range I most of the time, and can easily spin all four tires when the loader hooks a decent size rock. That tells me that I've got more than enough power & not enough weight/traction to put it to the ground. Outside of some large jobs, I can't see where I would need anything bigger, and for those cases, I can grab tractors from out on the farm.
The 33D was only $500 more from my dealer, but I didn't think I'd need the extra power. Turns out I was right! My dealer says he sells more 29D's than anything else as it's the best mix of power & chassis for the "compact tractor" niche. I tend to agree.
I know this doesn't provide any real answers for your decision, but I thought I would relay my experience, nonetheless. Try 'em all out & see which one fits you & your pocketbook best.
Best Regards,
Jay
PS -- If you've got tight quarters, like I do amongst the trees, SuperSteer is one of the nicest things you'll ever deal with. Especially when swinging around the loader. Well worth the price of admission...