I stopped in to the mower shop today and picked up a booklet on the new Hustler Zs. The new Super Z is rather cool, not to mention the 15 m.p.h. ground speed. I guess the Dixie is no longer the World's fastest mower. My question is there anyone running one of these units? Give me some feedback on these machines. I cut several large University campus locations as well as other large properties. The numbers say that a 72" machine will cut almost 11 acres an hour. I went with the Exmark 80% method and came up with 8.7 acres an hour. That is awesome if it's true. Anybody out there with comments??