At the ripe old age of 50 something, I am trying to decide wether to convert my traditional IRA into a Roth IRA. Is it better to pay the taxes now or later. Mine and my wife's IRA are in mutual funds if that makes a difference.

Also I hope to be fulltiming when I withdraw my funds. Does it matter which state I choose as my residence in regard to taxes?

There are lots of calculators available online to help you figure out the conversion question. A google should turn them up. When you start collecting the income will be taxable. Select a state with no state income tax. But look at the entire cost of residency in any state you select. It is the total picture that counts - not just one item....