That would depend on WHAT you like to ski as well. Haven't hit Big Sky yet, (I hear snow is great, though) so I'll give you brief info on JH and Telluride... Terrain is great at both places, (I like JH better for terrain) with more lift served, crazy stuff at JH, so less hiking needed = more runs. Grooming is a bit more extensive at Telluride. I've always had better snow at JH. Both have VERY nice hotels, but Telluride doesn't have many in the less expensive category, but ask travelocity.com for info on that.
Don't know if Telluride has snow tubing, (check website,) but Snow King resort in the town of Jackson has night tubing (not sure of day.Great towns to lurk around if you're into the shopping thing. My husband has been snowmobiling at both, liked it both places. Telluride has a great network of gondolas between the town and ski area, so transport is easier than the bus system in JH if you don't have a car.
No matter how much I compare, though, the Tetons are one of those places you need to see before you die. Nothing compares.
You'll have fun no matter where you go.