Have you looked into Belize ?
Don't know if I'd move there, but what a gorgeous place.
Have considered New Zealand (have friends there, but they love to tour the US) or Costa Rica. The problem is I love being an American, and doubt I could give up my citizenship unless forced to. But... my Grandad gave up his Italian citizenship to start over as an American. I guess anything's possible if it gets bad enough. I'd hate to have to make that decision.