The Beav is definately worth the xtra hour drive from Breck, Keysone, Copper. Beaver Creek also limits ticket sales, ala Deer Valley, so it should not be as crowded on the weekend. Better known than when I was there 14 years ago, but most of the lemmings still rather visit Vail. Man they really know how to put down carpet!
Like Dan said, if you have time & money, do the loop.