I will be moving out to the Bellingham area from Michigan after graduating from college this spring. I plan on getting a mountain sled and am looking for some advice. I have never ridden in the mountains and deep powder before, most is about 1.5ft in upper Michigan, and am wondering how much difference in performance exists between the 146 and 154 summit with the typical, conditions out there. Also any ideas of how these new 600R etec will be? Any help is appreciated.