If you can throw $1250 per month extra at the mortgage, you'll have the balance down to $230K within 24 months (probably sooner, since your regular payment will knock it down as well). Then, assuming rates are still below 4.5%, your property appraises appropriately, and assuming your break even point* is sooner than your expected move out date, refinance into something lower, then attack debt using the "Cascade method" (highest interest rate first), which will likely be (at least some) parts of your student loans.
*Add up all costs of the refinance (lender will provide this), then figure out how long you would have to stay in your home to recover them. If you do not plan to stay in your home long enough, abort the refinance plan and attack the highest interest rates first.