We've got a 1045 with the kohler. It is a throw away mower, of course. It has been very good for us with only routine maintenance. It cuts like a million bucks. My only complaint is that the blades have so much lift that you can easily cause a dust storm here. Like any other mower if that style, the traction sucks pond water. It is easy to get stuck around the farm.
We use ours about 6 hours a week. I would buy another. It will get relegated to sprayer duty before too long. It isn't worn out in any way, but that engine grenades with 500 hours or so. Or so I hear.