What do you want to accomplish by switching?
From my experience and strictly my opinion...
Greens look WAY better under LED, especially Hydras with B,RB,V cranked way up.
Purples and reds look WAY worse under LED compared to T5. For some reason it's just not the same.
Stag growth is better with T5.
Monti growth seems better under LED.
Zoa growth is WAY better under LED.
Other stuff like Stawberry Shortcake, Birdsnest, Digi's seem to be fairly equal for both.
With my tank, I have better polyp extension with T5 (not sure why).
The Hydra really made the colors pop and the amount of shimmer is no where near as annoying as the Kessels... But not as true (halide-like) as Radions or Mitras. With a director this would be a fairly epic setup. The wireless controllers are
. I would buy Hydras again for the price point. Their customer support is truly astonishing. Ask for parts and they arrive within a day or two.
Depending on your aquascape, you may want a bunch of these things. They will cover a 20" x 12" in the middle of the water column on a 24" tank (10-15" off the water surface). If you have them higher you loose too much power. Aim for one pendant for each foot x 20"-ish of tank you have. Check out the 8 ft tank here
http://www.canreef.com/vbulletin/sho...d=93114&page=6