The American Heritage dictionary deserves a mention, not only for its extensive usage panels of writers, but for its practice of putting the most current meanings first, so that the dread “Webster’s defines X as…” is not followed by some antique meaning from the 1700s, but by a current meaning. The OED has no equal, of course, but for a dictionary that one can lift with one hand and read without a magnifier, the AHD is a high value tool.