What is your interest rate on your mortgage? If it is low, I may stop putting extra towards this for a while at least and build your emergency fund and fully fund your Roth's first.
I would say you need a plan with that $655, and keep only a month worths of expenses in your checking account at a time, no reason to lose out on missed interest.
If I were you, I would have as a priority, building your emergency fund up to 3 months worth. Then I would focus on fully funding Roth's for both of you. After this is done, I would say pay off your car loan, and then build your emergency fund up to 6-9 months or so, depending on your goals.
I have my M.A. degree and work at a public University as well. Trust me, I understand not making as much $ as the private industry!!!
