Replying to Need help for a ski trip for my dad's 50th anniversary

So my mom just told me that she wants to give my dad for his 50th a ski trip with me (19) and my bro (21).

We've never ski trip outside QC and Jay Peak. We're looking for kind of a Pow trip out west. 
I was thinking of place like Whistler and my dad was talking about Utah the other day.

So I'd like some suggestions for where we could go and why. It would be in the first week of january. And could you say what's the legal drink age in that state/province.

Thanks