Sounds like a fun project. On the binding post, the more connections you have, the more 'leaks' you'll have. It is very easy to install new binding posts and it doesn't take away from the value of the speakers. Here are a couple of links: I like the recessed cups because, when I move them, the posts don't stick out. Some, similar to these, or these are okay. You might want to make sure they are long enough for the thickness of the backs.
What wood finish is yours?