I'm glad you're enjoying your K900. I've had my 2015 for 15 months now, and I still love it.
I don't think you should be too nervous about ice and snow. Yes, RWD cars are not as good in snow as FWD or AWD, but most of the perceived difference is marketing hype. Remember, it wasn't that long ago that almost all cars were RWD and tires back then were much less capable of handling winter weather, yet people got around just fine in the winter. Buy a good set of winter tires and drive appropriately for conditions, and you should have no issues. My wife and I live in Washington state and we both drive RWD cars, a K900 and a Mustang and we manage just fine every winter.