Cattleboy: I have had an 835R for almost 2 months and nearly 1/2 that time has been watching it sit in the dealers shop. Serious leaks, doors whistle, windshield was recalled and replaced, the foam seals between the bed and frame in front of the rear tires will be destroyed when you wash it. There is a new recall for CV boot protectors....... My list goes on forever.
Really give it a solid going over BEFORE you take delivery. If yours is like mine you may want to reconsider.
I think Mother Deere released this model before they worked out the bugs, esp with the cab. My dealer (who I buy a lot of big farm equipment from) is telling me they have cab problems with every one they sold.
Hope your luck is better than mine.