i personally have no problem with the cross the way it is. to me the cross is a beautiful thing, reminding myself of how Jesus died, reminds me that he took it willingly and joyfully. and that causes me to smile and rejoice.
but i would worry about offending people who dont see it the way I do.
why not use different symbols of the Christian faith? Doves, Salamanders, Angels,
maybe look for a symbol of your favorite Bible story, like David and Goliath,a sling. While the Cross is the biggest symbol of our faith, and its the most recognized and the most beautiful, its not the only, and it means different things to different people, so you could very well upset somebody.
whatever you come up with, I'll buy a few. I'm an aspiring Gospel magician myself.