Dont mean to rain on your idea of full spectrum leds but I have a unit and I have the regular blue and whites and I would buy the b&w ones again before the full spectrum ones. They give the tank a weird purple glow which just isnt to my liking. And without the blues on the whites are actually kinda green and not very pretty in my opinion.
I thought the same as you do, why not try the best and have no regrets but I actually kinda regret buying them now. :-( Not that they wont do a great job with coral just visually they arent as great as you would think.
I;d save the extra money and spend it on some corals or fish instead.