Right now I'm working with a 61 inch bobcat which has stood up very well, but I'm not really satisfied with it's speed. Stats on mower says it is able to mow 3.7 acres an hour. This comming year I will need at least one more rider because of growth. I'm interested in a mower which will one cut alot more grass per hour, and give atleast as good a cut quailty, and hold up to the pounding!!!!!