Which states' section 529 college savings plan has the best performing
underlying funds to choose from? Upon making a recommendation, please
explain how you arrived at the conclusion.

Dear George,

Tell you what, I'll point you to the investment results.

But, it would take me a hours to compile the data and come
up with results (the funds are tracked by state and by year
of maturity). 

So, here's the Investment Results page on SavingForCollege.com:
http://www.savingforcollege.com/compare/investresult.php

Have fun making your comparison.

Best wishes,

Your TaxMama-ga