Great advice. One of the things we plan to do is send the same total amount (or more) regardless of how low the minimum goes as the balance goes down.
The income tax check will knock 2k off the high one. :)
Dave Ramsey uses the "debt snowball". His theory is to knock out the debts from smallest to largest without paying attention to interest rate. By doing it that way he says it gives you a sense of accomplishment, and keeps you going, rather than tackling a large debt first. Once the smaller debt is gone take that money and roll it on the the next larger debt, and so on, till all are gone.