I've been shopping for a ztr and I've narrowed the search down to a Toro Z400 or a John Deere 717a. Both have a 48" deck. The Toro is a 21hp Kawasaki and the Deere is a 19hp Kawasaki. Both were quoted to me at $6400. Which machine is going to hold up to commercial use and give years of good cuts? I will be the only operator of the machine and I'm a 36 yr old mechanic who is easy on equipment and maintains them well. Going to pull the trigger tomorrow so any opinions would be appreciated.