Dual JBJ K-2 Viper 70W MH's?

[m2434]

I am running 4x65W PC's on my LPS dominated 20G. So far everything is going great, but I'm thinking of adding some clams and more demanding SPS corals. My thought was to either replace 2 of the PC's with a 70W MH or replacing all of them with 2 70W MH's.

I had a 55g with 2x250W MH's and later just 1, either way, it was too much light for the tank, so no, I'm not putting 250W's on my 20g... I also noticed that the corals in my 55g seemed to be "shocked" by the sudden burst of light and seem to prefer a gradual increase. So, I'd like multiple sets of lights versus a single big light. Therefore, my idea was either 2x70W MH's or 2x65W PC's and a single 70W. I can't find any 24" canopies with multiple 70W and if I added a 70W, it would have to be a retrofit canopy.

So, I'm looking for Ideas, one was to use 2 JBJ K-2 Viper 70W's. I think this would provide tons of flexibility, but I've heard mixed reviews of the lights. Other thoughts and suggestions are appreciated.