We love T-rex - very cool atmosphere. Good food - huge portions - can be easily shared.
For counter-service, I LOVE Wolfgang Puck Express (marketplace) - it was my favorite meal of our 8-day vacation in 2010. Also Earl of Sandwich is awesome!!! Sandwiches are really good and they have delicious brownies for dessert.
I have heard great things about Fulton's as well - we're hoping to try it this year in the fall when we go back.