Bought a new 600 Polaris eleven years ago. Run tracks in the winter, factory tires in the summer. If you install mud tires and go looking for a challenge then you will have problems with most any make sooner or later. I have blown a couple of belts over the years and now carry a spare, but anyone can hop on and drive without learning how to use a clutch and gears.
Around here the bike gets used 12 months of the year, often by visitors. My next bike will be a smaller (500) Polaris....