I am going to buy a new piece of mowing equipment. I mow a grand total of 15 acres, some of it with a 7 rear mounted mower. More and more I am developing park-like areas involving trees, as I have planted thousands of trees over a period of many years. This involves the need to quickly mow around trees. My 24 hp Kubota is a great tractor, but is not a hydrostat and does not have a live PTO, and the turning radius is too big. I want something that will be a capable finish mower, and have narrowed it down to either a John Deere garden tractor powered, mostly likely by a water cooled Kawasaki..... Or a diesel version of that same tractor, in the 700 series. One question, do any of you have the four wheel steer model, and has it been a good thing? Any particular problems with them? The other way I may go is to use a zero turn machine, either the Scag, Kubota, or John Deere. Do any of you have these larger machines and what opinions do you have about them? A concern I have had about the zero turns is the ride on uneven terrain and the back irritation that would result. The big Scags have 24 inch diameter rears and 13 inch diameter fronts, so they should do as well as a garden tractor. Having ridden a small Dixon, with small wheels, it is a punishing ride, and I could not stand to use it long term. Thoughts?