I like the Ohio Steel unit that has a set of spiraled brushes so there is less contact at any one time with the ground thereby reducing the stress on the nylon gears. I also like the Brinkly unit that has 3 brushes around the shaft for a better sweeping action, but of course. that would add to the strain on the drive gears. But then again I like the AgriFab unit because it's on sale, it's sold by Blain's Farm and Fleet that is only a couple of miles from me and also the fact that they're made in my home state of Illinois. Now, if only I could put all of this together in one unit!