We mow about 8 acres of yard and are currently using a Sears 2011 Craftsman 26HP, 54" Deck Tight Turn lawn mower. The tight turn front axle is obviously poorly designed because one axle has been bent and replace, and one front tire has come off the spindle with about 120 hours of use. We purchased this particular mower because it had the least bells and whistles, which means less things to break and it is easy to order parts. Normally, a mower will last about 5 years until something too major breaks. But another reason is that we have never been comfortable going to a commercial grade mower because we don't really have answers on the details of what are the differences, and if those differences are really worth the money. For instance, we do go through lots of blades (about 3 sets per year), so are commercial blades better and stay sharper longer? So, it you could provide us with some details about a particular commercial grade mower and why it would be better than a big consumer grade mower, we would appreciate it.