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Its really will impact you on the average age of you're credit folder. My whole thing is that if it pays off all the other debt, and it is the interest rate you will enjoy then I would continue on.
I would just wait until you paid off all the credit card debts, and let a cycle happen so when you go to buy you're new car the credit cards will all report a ZERO balance.
DTI will be a major impact here. In my experience I have a hard time being approved for anything if my DTI is over 30%.
Overall: I would look around at the current going rate for an auto loan.