2 options:
1. Tanganyika: stacks of rocks for shellies, julies, neolamps, etc...
2. Planted: driftwood centerpiece, w/ tall valisnera & swords, cories and apistos for the bottom, a 2-4 angels for the middle(depending on your w/c schedule), and 8 marble hatchets for the top.
Both ideas sound awesome to me!! Have fun with it, and good luck!