OK, John, heres a few ideas
Try to remember before you really used a machine; what are the things that you take for granted that weren't so obvious then:
FEL float for Johnny on the spot grading.
Quick attach loader and buckets.
HST or reverser for loader work. Reversers that don't require clutching.
Ergonomics, why this control in this spot is so handy...
Don't forget to tell him to try and get all the plumbing done up front, if at all possible, at least on Deere's it is significantly cheaper, and often cleaner installation.
I know you aren't trying to sell him your brand, but then again, don't be afraid to either. Your Kubota works well for you, and you seem to be happy with your dealer. Don;t fix what isn't broke. You might find out that another dealer that seemed OK wasn't in the same league as yours. A referral from you, a happy customer, might get your friend off on the right foot with your dealer and help you as well.
That said, I commend you for not making it out as "If you wanna tractor, you gotta buy what I bought..." Don't Oversell, but don't undersell, either...
Most people that see my tractor REALLY want a Yellow seat. It is a sad truth, but it seems that most of the brands don't offer that, even as an upgrade. You have to warn people about those things! /forums/images/graemlins/grin.gif