For those of you in New England and the Mid Atlantic regions there is the Peak Pass which gives you access to all of the Peak resorts.
Because we spend about half of our time skiing the East and only went west for one week a year, none of those passes really worked for us. Now that Sugarbush has joined the Mountain Collective (Thanks Win), the economics works out. We're planning on a Ski Better Week at Taos and a couple of holiday weekends at the 'Bush.
Epic is out for us. Our recent trips to Vail's properties, Park City and Breckenridge left us wanting.