Black Box, or generic ever-brand-changing Chinese LEDs.
I do not use BB, nor have I spent so much money on other LEDs that I feel like I have to justify my purchase by bashing a BB to make myself feel better. My general opinion is that they are OK and an give you fine results, but you will have a ceiling. I have only ever seen one or two outstanding tanks with black boxes and they were recently switched over. The general tank that I see with them and happy owners is a mixed reef that might be SPS dominant, but most of those SPS are Montis, Birdsnest, Poci and Stylos along with some stags and easier acropora... or young tanks with frags that have no encrusted the plugs. I have never seen a reef anywhere near Ed's, Copps, etc. with them. I put that ceiling at about 75% of what you can do with other lights. Considering that most people never even get to bump their head on that ceiling, then this works for a lot of folks.
I guess that my advice would depend on your goals. If you want to have a tank that is the best of the best, then do what they do... which is not black boxes, or even LED at all (except for one or two). There are all kinds of threads in this forum of the advances that tanks have taken when they went away from black boxes - Schnitzel has one that is probably pretty recent and easy to find... he wanted to get above that 75% ceiling, and he did.
FWIW - I infuriate people with this statement, but also get thankful PMs from people who have found a new insight and "get it".... so here it goes. The "best of both worlds" actually ends up being the "worst of both worlds." In all areas of life, going all-in and knowing and accepting limitations will get you farther along that trying to walk down two paths... it is the same in reef keeping.