I have the 350W version and I think its a great light. IMO the coral growth, including SPS, is very good and so is color but i also have a very shallow tank (12 inch). The point source lighting provides a very intense shimmer which I like (some do not). The light also puts out almost no heat and has very small (and i think attractive) housing.
Biggest drawback is the inability to control dawn & dusk settings with timers as it only has a single power cord (you can manually dim/control white and blue). I also believe it is not compatible with any controllers. If these points are big deal to you then I would look at others.
Faviafreak has a kessil thread that has some good pics in it. That thread was the one to convince me to get the light.
I definitely think you should try and see the fixture before you purchase 3 of them for your new DT...the manual dimming is a big deal for me personally but i love the light output and am happy I purchased one.