Hey Jim,
Very nice!
I think you've got it there - especially when you finish the greenery portion.
Landscape lighting would also be a plus. A vertical element with an uplight and a couple of path lights along with maybe an underwater light with LED color changing capacity....or just warm white.
I haven't done a lot of water feature stuff but did a solarium once and here's a few pics of the plant combinations I used in case it is any help. Bromeliads are wonderful IMHO and the Hawaiian Ti Plants add tropical look and color. Mix up your growth habits and textures and keep the plants in groups for strength in visual impact.
