The Accord is a more comfortable cruiser than the Civic, and they're built and engineered a little bit better, and therefore, last a little bit longer given the same driving and maintenance habits.
The Camry is another nice one. vi_edit recently got a nice one for about what you're looking to spend.
Beware though! For cars in that price range, it's essential that you get a mechanic's opinion, and reject any that show signs of neglect or indifferent maintenance.