6% isn't awful, I'd say it's right around the tipping point. If it were me, I'd probably fund your IRA first. If the rates were closer to 7%, I'd maybe come down on the side of debt payoff first.
The usual recommendation is to pay off debt >5%+Treasury Yield (see more
here) first, then fund your IRA and 401k/403b if applicable, then pay off lower interest debt.
Edit to fix typo.