Looking to get into a new Summit. I'm looking at 2 2016's and maybe a 2017. The 2016's are smoking good deals on either a 154" X or a 174" SP. The 2017 is an 850 165". There is roughly a $4000 price difference between last years 174" and the new 850. My first question would be is the 850 worth the extra money?? Secondly, how much potential for catastrophe would there be if I ever rode the 174 around here(with sufficient snow)??. I may want to zip around with my buddies occasionally and don't want to bend rails or anything. Thanks