I didn't know GHL had a light bar, awesome! I may have to ask you about that in your thread soon.
As for my tank... You guys ever overthink everything? I do.
Calcium reactor -- Or more light. That is the question.
So on lighting..
I love my radion, but frankly, I really feel like I could use two on my little cube... I really feel that running the radion front to back is ideal to make sure everything is getting a nice blanket of par -- at the same time, I don't feel that's enough for my tank. My corals are absolutely loving being blasted by light.. So I'd love a second fixture, but at $850... Ouch. OUCH!
So this makes me interested in the Orphek bars. I like 'em, and at $120 they're priced pretty darn 'right' to me. Maybe just a single one is all I really need to add what I feel is missing. They're strong, but not totally overpowering.
Calcium Reactor
But man... Calcium reactors are just stability exemplified. Every tank I see running a Calcium reactor has great results, and improved growth. It costs a bit of an arm and a leg to get started... yeah... But the benefits outweigh the cost.
Which helps more? What will give me what I'm seeking more cleanly? Maybe just buy some high end SPS instead? Decisions decisions..