"Zen" themed wedding centerpieces?

Our wedding is following a Japanese/Zen garden style wedding. Our colors will probably be dark browns, creams, whites, greens and possibly a pink/purple color which will be present in the flowers. We are planning on using things like orchids/bear gr/bamboo/bonsai trees/magnolia/cherry blossoms. Nothing is set in stone yet so we are kind of just trying to find ideas and see what we like. Does anyone have ideas for a center piece? We have thought of a few things such as a small Zen garden with a branch of magnolia or cherry blossoms or perhaps a simple potted orchid. We also considered bamboo shoots in simple vases with stones and water in the bottom. Perhaps a bonsai tree in the center or a simple water fountain(we are leading away from this idea because they can have a humming noise that could be a bit distracting, as well as a power chord, unless we get batter powered). Does anyone have any ideas? All suggestions, simple and extravagant, are welcome.