Thanks for the tips. We're willing to take a chance on the Draceana. We have pink ribbon grass in our water garden in the backyard so the Draceana will kind of be the indoor version of that. Thanks for the heads-up about the fern. We may implement it in the area outside of the riparium. The Hypoestes splash will also be a gamble.
My LFS sources will have crypts for sure. This Tuesday I'm going on a big plant shopping spree in San Francisco. I'm also getting a black background, a thermometer and root tabs. The C. Wendtii I remember seeing potted submersed for $15. Is that a bad deal?
Crypts will definitely be on the shopping list. Along with Java Fern, Dwarf Sag, Vals (or some kind of tall grassy thing) and anubias.