I hadn't seen that Norco. That really is a sharp looking fat bike. Alloy frame and fork. The up side of that is that it may be lighter than the Raleigh I linked to. Down side is that it may not have the extra bit of springiness that you get with a steel frame and fork. I have a couple of rigid singlespeed mountain bikes, one steel and one alloy, and the difference in ride is detectable. That's with standard tires though; I don't know if it's a factor at the pressures fat tires run at.