1) Assuming you have a relatively liquid emergency fund of 6 months of expenses, including loan payment minimums.
2) Assuming you feel like your job is relatively stable- no signs or rumors of impending layoffs, no reason to believe you as an individual will be fired, not a job based on commissions or anything like that.
3) Assuming you are now very close if not over the salary where you can no longer deduct student loan interest
What are your plans? If you think your expenses are likely to increase and you won't be able to save as much in the future (having a family?) I would pay down the loans if I knew I could pay one of them OFF before that time. That way you have more flexibility in your monthly expenses. Looks like, conveniently, your highest interest loan is also the smallest. Will adding $600 a month to the loan get you out of it within 5 years?
However, if guessing at my future, it seemed like I was going to have these loans for 10-15-20 years almost no matter what, or my expenses would stay the same and my salary were going to increase, I'd max out the 401k. You won't get this time back on gains, and in a bad scenario you could always withdraw the 401K money (at a penalty) to pay off a loan. The loan payments, if they are federal, have some flexibility to get a deferment, IBR, Forbearance etc. if your income drops or disappears. I'm fairly certain that if you keep your job, keep expenses the same and Max the 401k and pay off the loans later with additional raises, you'll have more money at the end.
If the job seemed unstable, I'd save up a year or more of expenses.