Rick,
I have a square coin, (Happy Cache-o-Ween) and BubbaBass has an oval coin(Cache of the Day) .Those shapes are cool , but if it is to be a shape like a heart, The way you have it is cool. How about putting a coin in one claw and a TB in the other claw and that would fill up the heart shape. Even Kacky's Idea of two huge claws is good.
In the end the coin maker would do what they could to fit it in the die cut that's chosen.
opalsns