LED build for 75g reef

I figure with a T5 fixture you don't just do blue and white, well I don't. I mix different spectums to achive a 'pop' of color in my corals so it stands to reason the same would apply with LEDs. But with LEDs it seems there are potentially more options.
I totally understand wanting to see a fixture with the different colors because LEDs aren't like T5's you replace every year and can play with different color options. It seems once you've chosen on the LEDs, you are stuck with them for many years.

@phys

From what I've seen, most DIY LED setups have the LEDs bonded to some heat sink.  It's not impossible but not simplistic to replace a single one, unless you're thinking of a different mounting method I haven't considered?  Replacing a strip of LEDs is super easy, but expensive.

Agreed that LEDs are the greenest option.  When you get a solid manufacturer, and if you can refrain from being nitpicky about the configuration and constantly wanting to change it , then you should have your LEDs in place for about 5 years before having to do anything to change them.

After getting a power meter, its shown that im only using 160 watts of TOTAL power and the fixture is brighter than the previous 260 watts of PC and t8s that were on before which was only bulb wattage. that didnt include power that was lost through inefficient ballasts.

So wait you use epoxy instead of the heat sink plaster?

I use epoxy on the outer edges of the star and heat transfer epoxy in the center.

I'd like to know more about that LED setup before I'd buy.  Not saying I wouldn't, but I'd like to know what I'm getting into before I spent money.  It just may be worth it, but unless the manufacturer tells you what they put in there, you never know.