I always like a good sandwich from a real Italian deli. When I make sandwiches for work, I usually keep it pretty simple, since I don't have a lot of time in the morning.
There's also a place in Boston, Parish Cafe (
http://www.parishcafe.com/menu.html), that does sandwiches from recipes of prominent local chefs. I've never had anything there that I disliked. Plus, they have a great beer selection, which doesn't hurt.