I have six k7 over this tank and love the look. I run a little more white by choice. I have other lights also but for colors I can get, par output (300 on the sand bed for clams) and the price these are hard to beat. I've had them for two years I think. I bought all six for less than the cost of a single xr30. I hope Noopsyche gets things figured out but the silence isn't encouraging.I cant speak to the Hydras, but to echo @bdesign post above. The noopsyches do look great and can put out a lot of light. Setting it up was pretty straightforward.
Some people complain about the app, but I thought it was fine. Ive seen a lot worse apps on more expensive equipment.
This are mine. Sorry for the long video, it is one I made the other day to record tank growth.
EDIT : I missed Zach's reply. Sorry for your loss.