last year on whistler the max snow accumulation was over 50 ft, what slc resort beat that?
for arguments on quality see the best powder thread, personally i think 10% (whistler) seems good, thick enough that you wont plow into a boulder off a drop and fluffy enough be able to fly through it.
light is only good to a point. In the northern interior, snow blows right off the ground till its bare and all of the snow is stuck in the first 30ft of trees.