Plus, I find that flying into Denver is typically cheaper than flying into Nevada. And I also find that you can rent a place cheaper (through VRBO, especially) in the Summit County area (Breckenridge, Keystone, Vail, Copper Mtn) than you could in Nevada.
So, if I were going on the best ski trip while trying to remain somewhat inexpensive, I'd say stick with Summit County (in this order):
Vail
Breckenridge
Copper Mountain
Keystone
You could stay in Dillon or Frisco, which are not at the base of any mountains, but are a short drive away to Copper, Breck, and Keystone. Frisco is especially quaint while Dillon is more commercialized. Breckenridge is nice, but will be much more expensive, as is Vail. I don't really recommend staying at Vail as its the only resort that's a bit of a drive and I wouldn't want to make that everyday.
But it's worth the drive for one day of skiing.
As I mentioned- I love the Lake Tahoe area, but just find that it's typically more expensive.