We use all 21" mowers with great success, sans a few flaws. Quite a few of my customers have very thick St. Augustine, and the Toro Proline cutting height only goes to 3 1/4. Even on the highest setting, and actually out of the setting resting under the bracket this isn't high enough for these lawns. Therefore, despite my love of Toro's drive system I'm on the hunt for another set of 21's, ones that we can outfit 3 trucks with next year. (9 mowers total). I demo'd a Honda, didn't like the handlebar design. Looking into Snapper and Ariens/Gravely. Does anyone have any experience with these, and any idea of their top cutting heights? I need a good 21 with a 4" cutting height and 4mph speeds that will be cutting 25-20 lawns per day. Thanks!