Oh, and another reason why to stay away from Leporacanthicus sp. (L91 3-beacon, L-264 sultans, etc). They tend to do a lot of digging, so you may end up finding the plants you lovingly planted uprooted. One potential solution is to plant in pots, and not straight into the bottom of the tank.
If you really like L91, then go with that one (I like them also; I have a dragon fin variety). Just get plants that will be able to deal with the L91 digging. Use epiphytic anubias and java fern on twigs or driftwood near the top of the aquarium. Use deeply rooted crypts, and place large stones around them to deter digging. Keep the plants in pots with rock wool. I have a small piece of driftwood with a hole that gives access to the gravel, and the valisinera has been able to eke out ok.
