My father-in-law owned my bike before I got it. He installed a 2400# Warn when he bought it. I have a 2006 Chinese quad as well and my wife had a 2000 or 2500# off brand winch on it before I saw the bike. Both winches have seen heavy use, the Warn probably more, and the off brand has had repairs done because of stresses to inferior components. AFIK, my FIL has never done any maintenance to the Warn. I pulled off the rollers and cleaned to sticks and crap out when I got it last fall as well as changed the cable. Other than that, it is working 100%. The off brand has needed more TLC over the same time period.
A Warn winch is like a Honda, you get what you pay for. My off brand quad has had more time and money spent on it than the Honda. Right now I am waiting on a brake drum for 11 MONTHS!!! When I heard my FIL was upgrading his Honda, I jumped on it...