Looking into buying a 500 Arctic Cat.  Heard through the grapevine the automatic choke may have problems in cold weather.  It's common to hit -25 in the winter here, and will be using it to plow snow and get around.  Wondering if anyone has heard anything about this or has general comments on the quality of this machine  

Yeah it hits the same temps where I live and just about everything is pretty hard to start at that temp. but I know a lot of guys with AC and they see mto be a reliable machine. I heard you should switch the gas to the off position after use in the cold weather and it works for me everytime. I kept fouling plugs before that on a new machine. Good luck!