I can't answer the question as it is asked. Your portfolio choice depends very much on other factors in your life and retirement such as the size of your Social Security benefits, whether you have an employer pension, and whether you own your house or condo free and clear.
The Couch Potato Portfolios vary from 50 percent fixed income down to 20 percent fixed income. If your situation includes strong SS benefits, no debt, and no mortgage debt on your home, you should be going for one of the more aggressive portfolios--- at least the 6 Ways from Sunday which is 2/3rds equities.
If you have some debt, limited SS benefits, etc. you should favor the lower risk portfolios such as the original Couch Potato or the Four Square.
All the portfolios are listed, with trailing performances, on the website.
Scott