Jeff, although we here feel the Montana and Mountaineer are the best choices, I personally don't see a bad choice in any of those you listed. I don't have any personal knowledge of the after-the-sale followthrough from Forest River but we just finished up with the Keystone Service Center and that alone convinced me if we ever trade it will be another Keystone product.
No matter which of those three you get, you'll be getting a good rig. Good luck and let us know as this plays out. And please pass on to me any excess donations you receive.