There is a bunch in the works for these lights. The one thing I don't like about the advertising is that they haven't really shown them over a tropical tank, just temperate.
The Plasma can be turned down to achieve any PAR you like.
I didn't care for the color of the current unit over a tank, but that may be changing in the near future. Early adopters pay for being first. Also the 450 in the spectrum is seriously lacking, but who really knows if that will be problematic.
We are doing a study now, and they do seem to grow coral. More later though, that's how studies work. To get the same PAR the plasma is about 2.5 times higher than the MH.
There is no reason to mess with the reflector of these lights, as it is pretty built into the unit and the amount of UV these produce unshielded would make me not want to mess with it. They are working on making it so the user can adjust the size of the throw by adjusting the reflector.
FWIW, when the next version comes out, the 41 (with the possibly better colored bulb), I am seriously considering getting two for my home tank.