Thanks for the excellent review of the HRX217 mower. It sounds like a good mower but not truly commercial grade. When I looked at it in the store, I was impressed with the build but did not like the length nor the cumbersome engagement of the BBC and drive levers. It seem liked this would slow you down a lot. The Toro SR4 seemed more intuitive plus is has a decent side-discharge section on the side. Not sure about the Personal Pace though. Seems like you're pushing the mower and not vice versa. Sometimes I think I'd be better off getting another commercial Exmark/Toro. Not that much more but at least you know you're getting a good piece of equipment.