I live in the area, but do not ski. Howver, I can still tell you that having lived around here for over 5 years, the vast majority of the many folks I know around here who do ski regularly prefer Copper Mountain. From what I hear, Copper is reasonably priced, has good, varied runs, fewer out of town skiiers who don't know what they are doing, etc. You probably can't go wrong, as I often hear locals going to pretty much all of them, but again, I consistently hear a preference for Copper.