Pretty sweet, might I inquire where you obtained said "Dragon Stones?"
I think you have a very well designed hard scape here, the driftwood and dragon stones in the center catch my eye, but otherwise it's pretty lacking. (Of course cause you haven't planted yet)
I would plant taller plants like jungle vals or spiral crypts in the background and mosses like weeping or willow on the stone on the left and on the right side of the wood, I wouldn't cover up the larger stone or the center of the wood with plants.
Personally I think this scape looks great without carpeting plants, but if you wanted to I'd do Micro Swords, Belem Grass, or Glosso.