I recently bought the Browning edition of the Polaris 850 Sportsman. I am writing this review after six hours of ride time.
This ATV is amazing. It will do/go anywhere you want and with the ride of a Cadillac. The lights are very good at night but the larger gas tank is great (haven't tested for gas mileage, yet).
The ground clearance is close to advertized. I will change out tires with a 6 or 8 ply in the future. It's not that loud for as much power either, but when you go full throttle, the front end definitely gets light.
Overall, there just isn't a better bike out there. I test drove several before buying and none compared to the soft ride of this Polaris.