I can assure you that the design will be interesting. I haven't seen any sets acomplish anything quite like what I want to do. I am just hesitant about saying too much. I do have the set shapes complete, and half of the artwork. The hard part is filling both sides of 6 coins... I am talking to a minter already and once it is conceptually all there, I will definately share more.
I may be a little premature on my info gathering, a better time may be when the artwork is done, however I just wanted to see if it is out of the question to try to move a 6 coin set. Not only is it a lot of $ to make, but people are buying 6 coins at a time too.