I just installed one Ecoxotic Stunner 453 LED and reflector into my Biocube 14 hood. It was a simple installation. The LED is mounted to the reflector that sits over the fans.
So far I am very happy with it. I'll know how the corals like it soon. The display area is brighter now. Ecoxotic responded quickly to my initial email and the product looks well made.
I have some pictures here:
http://www.flickr.com/photos/59138365@N05/