yeah jackson is so sick. they have everything there too, steeps, trees, cliffs, awesome BC. Alta is good, but kinda crowded. Kicking horse is like canada's jackson hole. its steep and its BC is really sweet too. There are so many fun chutes right off the lifts and even better ones within a short hike. Also, it is never crowded. you can ski pow pretty much all day
Don't go to Alaska, unless you are LOADED. Yes it has insane powder with many first descents blah blah blah, but it's insanely expensive. Alyeska is good, but places like Whistler, Mount Baker, Jacksons Hole, Squaw, Alta, etc are better for everything else overall.