I came across this just as I was about to ask people the exact question. I'm planning a ~90 cube build and also looking at the tricky lighting question, particularly when it comes to front-back.
I've had a 75 peninsula for so long, I can't imagine not having a look-through type 3 sided view, but the back will be against the wall. Solution? I'm not going to fret so much about the front to back coverage, and mount/hang the light a little further forward than center.
I like the look of the Maxspect ethereal, but discarded it early on because it looks to me like the mounting arm front to back adjustment won't go far enough without also raising it along the diagonal.
I ignored any of the panel type single color per lens, because I already have them and don't like the random green and red colored spots they make. I don't know if the reefbreeders do this, but my Chinese black boxes do.
I tossed out the recurve because I'm not so sure, despite their claimed coverage, if it will actually produce usable light front to back with those strips. All the high-powered pucks are lined up down the center.