If an engineer asked you...

[Jon Bos]

I think that the best cab out there today is a cab from an 8000 series John Deere tractor. The finger tip controls are really comfortable and convienant, the views looking outside are the best too, the side post showing gear, speed, and rpm, is a good feature too.

Underneeth the hood, I am not too sure about all the time - I hear mixed reviews. But I do find the ergomatic stuff to be the best in the industry

Good Job John Deere

[Laapa]

Hey Woodbeef, I did check out the T-series at the ELMIA show the other week, looks like the old ones pretty much with a "soap/box"-ish cosmetic job.
The S-series looked interesting though as did a certain lady tractorpuller who does frequent promotion for Valtra on shows over here. Ahhhh....

One thing I would look for engineering-wise is better ploughing ergonomics, as in enabeling the driver to turn the seat a great bit right and left while still being able to comfortably reach all the essential controlls, kneeroom helps too.
The 7710 is good but could be even better.