Best used can am?

I live in Alaska and am looking to buy a used can am, or something else, that’ll be reliable. Can only spend $5000-5500. I want the can ams to be 2009 or newer on account of the Visco-lok II being implemented that year. I will use it for snow, as much mud as I can and trail riding. Will often ride w/ a passenger ranging from a 6 year old to my wife. Would a 650 be enough or should I go for an 800? How much mileage is too much in your opinion? Thanks.

Best used can am?

I live in Alaska and am looking to buy a used can am, or something else, that’ll be reliable. Can only spend $5000-5500. I want the can ams to be 2009 or newer on account of the Visco-lok II being implemented that year. I will use it for snow, as much mud as I can and trail riding. Will often ride w/ a passenger ranging from a 6 year old to my wife. Would a 650 be enough or should I go for an 800? How much mileage is too much in your opinion? Thanks.