I went with a 66" KFI brand plow for my Honda Pioneer 520. (I might have gotten away with the 60" if my UTV was stock, but I have spacer on the wheels which bring the width just about out to the width of an angled 60" blade.) I chose their Pro-Poly blade over the steel one: the Pro-Poly is taller, and reports were that it sheds snow better than steel blades. I did not go with their optional hydraulic angle adjustment.
You might want to go with the 72" blade with your Ranger 800 to make sure you covered your tracks with the blade angled. but someone with more knowledge of that UTV would probably have a more informed recommendation than I. (I believe a stock Ranger 800 is 60" wide. A 66" blade would cover 59.8" when angled 25˚.)
I plow about 1/4 mile of driveway, mostly gravel, but the loop up near the house is paved. There is a section of steep grade that tends to ice up. I generally throw a couple of sandbags in the bed to counter the weight of the plow. I run diamond pattern square link chains on the rear tires. (not as aggressive as studded diamond pattern chain, but easier on the paced portion of our driveway up near the house.) I found I could get away without the chains as long as the steep section has not iced up, but once I got the chains, I left them on for the rest of the plowing season.
I've been very happy with the setup.
