Very nice. I'll just throw out a suggestion to consider doing the most beautiful U.S. (and/or foreign) stamps which would include Scott #565, the 14c American Indian (my favorite). And maybe Scott #1 and 2, the Columbian commemoratives, maybe others --particularly stamps that combine both high quality engraving with appealing historical images.
Thank you for the feedback Drew! I really like the American Indian stamp and will definitely put it on the list. We will be rolling out the Liberty series Jefferson soon and then we will probably be looking at doing your suggestions (at least the Scott #565 to start).
What do you think about the Inverted Jenny? Seems to be rare and pretty popular. Maybe it would make for good discussion if it was hanging in an office.