Title says it all. Primarily high end z/p's and sps. I'm planning on 2, but if it's overkill, then why spend the money? I don't wanna have to get 2 units, and then end up running them at like 20%/50% white/blue. I could always just get 1 if it's enough coverage, and run it at 40%/100% to at least utilize it more.