Definitely Citrio. Across from Baker's Best. Smaller, not as much of a scene. Much smaller menu but high quality and consistently delicious. Also has take away and a great place to indulge in desserts. And did I mention sweet potato chips?
In terms of my personal preferences, Farm Grill would by my top choice for a quick sit down or take out meal, followed by Blue Ribbon. Kuzina would be my top choice for a more relaxed sit down meal.
Barry's Deli, The Local, Johnny's Luncheonette, Union St, lots more. Really would help if you were more specific in the price range and atmostphere you seek.