Telluride is what you're looking for. That guy above doesnt want you to go to montana thats why he wrote that, but it looks really sick, they got Big Sky, Bridger Bowl, and Big Mountain, that look dope, and its not the CO luxury or crowds, so i'd say MT
I was just joking, if you want to ski Montana it won't matter because there's never really that many people skiing. Just start researching resorts and see where the good snow is and what sort of terrain you want. www.bigmtn.comwww.bridgerbowl.comwww.bigskyresort.com
Depends on what you want to ski. Montana has more big mountain and powder (less people and way cheaper). Colorado has better parks and is way more expensive.
You need to give us a price range, a date range, and what you want to ski (park, bumps, bowls, big lines, etc) or else nobody is going to be able give you any valuable information
Never skiied montana but I found most resorts at colorado are just groomers and they don't have supersick terrain open. A-basin was pretty sweet but pretty small and not very steep.