if you go to CO don't ski copper.. went out there for nationals in april and over break in december and the park sucked both times, and besides the parks, vail and breck have 10000x better skiing... i've never been to PC but my brother and dad went out last year and said it was amazing, so many resorts within like an hour and you can ski crazy parks at PC and then some super deep pow out at alta/snowbird, so that sounds like a good option for a bit of everything, but lines may be crowded.. as for something different, maybe sun valley in idaho or big sky in montana