@Ryan John Deere is probably the biggest seller as they make a tonne of different models and specifications to suit a wide variety of uses and customer preferences, John Deere do command a premium due to the name but they are very good to deal with, they build tough gear, and listen to their customers, I find the interiors of their Cab tractors to seem a little old fashioned (look at a John deere from 1995 and the equivalent current model and the interiors are remarkably similar, albeit with subtle changes and added technology) . They would be followed closely by Case (International) who also now build all the New Holland tractors,many very similar or exactly the same as various case models (only blue)