Hello everyone, this is my first ever question. I have been using a Hustler 42" cut with a Kohler engine for 4 years, it is their Fastrack model, it has about 400 hours on it. I have looked at the new ones, but have also looked at Bad Boy, Gravely, and Dixie Chopper. I am trying to stay around the 3700 dollar range. I am totally confused. At age 59, I hope this is the last Zero turn I will ever buy. The Gravely salesperson showed me a 44" commercial, a 2012 model, that he will let go for around 4600. I mow several locations, not commercially, just properties that I have. The Gravely seems to offer more comfort with my legs, since I have 2 knee replacements. I need to do something, I have already sold my Hustler. Any suggestions?