I am looking at buying a couple toro timemasters. Has anyone used the new commercial unit? How much did you get it for? What about the residential grade unit...how has it held up? I have had several toro commercial 21's as well as the personal pace mowers. The commercials have been great and the personal paces held up well for a cheap mower plus they are inexpensive to fix when you do wear them out a little. Any info would be great thanks!