Rotundifolia and indica have somewhat minute differences. They are commonly confused with each other. True indica tends to be more intense in its coloration, I believe. Also, according to APC:
"This plant can be differentiated from the closely related R. indica by the differences in the two species' inflorescences. R. rotundifolia bears groups of terminal inflorescence while R. indica has solitary flowers on the axis of the leaves."
The plants look nice. As far as aquascaping, I suggest picking a layout that you want to go with, be it concave or convex, center mound, or triangle. As it is now, there is no real form to it all. The large leaved java in the middle is kind of separating the tank into two parts, also. Aquaticplantcentral has an awesome aquascaping forum...its a great resource for inspiration and feedback.