Alpine is what they changed the Everest name to in 2012. The name Everest never caught on. It is top of the line Keystone, second to the Big Sky. We love our Everest. Solid cabinetry, solid countertops, and great floor plan.
Head on over to the Keystone forum and search there. Despite all the Keystone bashings, we have had three of them and little to no problems.
The Montana's are very popular, and I'm sure you will have a lot of responders direct you to the Montana.
Check out the specs, Alpine vs Montana, and you will see the difference in build.
Good luck with your decision.