I have an old '96 Kubota B7100 4x4 HST. Love everthing about it but the Thermo-syphon cooling. Gotta take the air hose and blow out the radiator before each use or it overheats. I think some of the slightly bigger one have a water pump and thus no overheating. This model has a 3 cylinder diesel 16hp. Came with a 60" belly mower. Needs new/better blades but cuts fine.

Half my land is sloping and the other half is near vertical (<40 degrees actually except for a couple spots-but it FEELS like 90 when you are mowing sideways on it!). When I bought this one I had just missed out on buying a larger B7200. Search craigslist thru searchtempest or something for best deals.