Best (Unknown) Retirement Tax-Havens

Forbes has a list out there for Best (Unknown) Retirement Tax-Havens. For a change my home state Michigan fares so much better in this list compared to any other "best lists" I have seen so far. Factors which were figured into this list were (Tax Exemption on Social Security income, Exemption of State Income Tax on Pension Income (includes IRA account withdrawals), No Estate Tax, Additional Personal Exemption).

(Note: The Forbes article came out before the recent tax increase in Michigan. Not sure how this would have affected Michigan's ranking).

Here's the Forbes Map of "Best Places to Die (TAX-WISE)"