After dutifully sampling the suggestions of fellow hounds as to "best" cheesesteak in the metro-boston area (and having my memory jogged by psmithy-dude's arlington posting) I humbly submit the steak and cheese at Nick's roast beef in Davis Square, Somerville. Now, there's nothing that special about the steak (or the cheese for that matter) but it's the bread that keeps me coming back for more. Of course, one can get other sandwiches on this yummy crusty fresh bread, so don't feel confined if you're actually hoping to get into a bathing-suit in a few months.
Would someone else give this a try and hold it up to others they've had? I might be blinded by the proximity to home, but I think it might be the best.