Wow posts sorry I missed them ......forgot I posted here
This was taken last weekend at Good Spirit Lake near Yorkton SK.
We rode from there to Duck Mountain Provincial Park in Manitoba. It was -10 and the trails were awesome. Even had a chance to stop and beat up on some "ditch pickles"

. None of them want to go against the 1000's so we humiliated them with the 800's
Irish liquid cooled is a must IME I would go with a Ski-Doo GSX or with a Yamaha Venture. Both of these are for comfort they are like a couch on ski, rear passenger handwarmers, air ride suspension etc.
I would put my money on the 'Doo. My picks would be
Ski-Doo
Yamaha
Polaris
Arctic Cat AKA "Ditch Pickles" too bad there isn't an ugly enuff green font color for this