For some reason, I really liked Eyetrip's big mtn/pow segments a lot. Pretty much all the guys in those parts stratigh up killed it. Wiley, Josh, Duncan, Delorme, Rainvill, All of them just put on an amazing performance of skiing.
Revolvers was good, too. Charley ager with his mindblowing skiing abilities, Tudor slaying some insane AK lines, Pep slaying as usual, JP Auclair taming insane alaskan lines, And a few others I can't think of right now had fucking great shots as far as big mtn/pow wise is.
Light The Wick I hear has some fucking crazy big mtn shots all thanks to some key slayers like sage, townsend, lange and others. Some insane shots from what I hear.
Pretty much those are the only 2 movies I would reccomend for some sick big mtn shots. You could check out Out Of The Shadows from Dendrite Studios. The trailer is super sick and I am guessing so is the movie.