There are quite a few pretty cool plants you could put in there. It might be more difficult to find stuff that will grow emersed and which is also authentic to the habitat. Would you be willing to fill the tank to just 1/3 to 1/2 full? You could do a riparium type setup, or plant taller emergent stuff right in the bottom. It looks like you have everything hard-plumbed already and it might be difficult to have the tank half-empty(?).
You know for underwater plants needle-leaf Java fern might be a good one to start with. You might want to cut back on the lighting for this non-CO2 and high pH setup.
Java fern would work well!. I suspect I will want to raise the light - both to accomodate emersed growth and to keep the algae in check. This could be a modified riparium. I will most likey just work with a few species as I think it would look more authentic
Thanks for your suggestion