I actually love the idea of the grab bag! Don't tell anyone what they are getting, and let them just how it does in their tank. How's the sunset hygro doing? I love the Tiger Hygro from thinktank, them two hygros makes a good combo.
Right now, I think the tank looks like chaos, I need to fix it up again. That's why I love planted tanks though, there is so much to do compared to setting up a regular tank.