There are a number of coffee carts on the way from the 7 train to my office. Occasionally, when I am out of oatmeal envelopes (as I am presently), I will buy a bagel from one of them.
I don't really have a favorite, although after this morning's experience, I'm tempted to consider plighting my troth to Sam's (on the corner of 44th Street and Third Avenue). Nice guy; completely enjoying his job. I like that!
A blog entry by one of his devoted customers is right here. Go, Sam!