Oh a single Kessil is a nice light but I think it's rarely adequate. I have always used them in combination with T5s and more recently with Reefbrite Actinic strips. I had 3 of the original A360WE, 1 every 24" across the tank and 3 of the A160 that I used to fill in the shadows. But that system came down with a recent move.
I just ordered the updated A360X and I'll use that with a couple of the Sol Blue for a 20g cube I'm setting up. I'll have the Apex cable for the Sol Blue soon and so all the lights will ramp up and down, plus have a whiter period mid day for a couple of hours.
I've never seen the ATI Straton. I'll have to see if any of the L.A. shops have it the next time I head down there.
Now
Dalua's Illumagic X4 is finally available in the U.S.. I've got friends overseas that are using them and love them. So that's a consideration too.