Beautiful set up. Much preferred to the open tanks that I often see. When they get really big they can/will uproot the plants just by swimming by. I like plants but had to revert to large plastic ones that I tried to wait down with rocks.
The only rooted plants are the vallisneria and I placed them in the corners to try to avoid being uprooted (or at least to delay that). For the center area, I chose smaller plants that are attached to DW (anubias and java fern - the later not there yet) thus not being able to be upooted and giving more swimming area.