That is a tough one.
All things considered, I MIGHT goto Isle of Man. Many people who have never been to the Isle of Man are not sure exactly where it is! The answer is that it lies in the Irish Sea, between England, Scotland, Ireland and Wales, less than 60 miles west of the Lancashire coastline, and it is easy to get to thanks to excellent air and sea services.
All in all it seems like a good tax haven, though others may not agree.
But then after awhile, I'd get bored and come back!
Maybe 6 months there, until the fever died down.