You could look into an older used Red Sea AIO, if I remember correctly they used to produce a larger AIO (i think 50g and 75g) that had an enclosed canopy like the biocube. Not sure what kind of lighting they came with, so it might require a diy/retrofit lighting upgrade, but otherwise they’re pretty similar to the biocube in terms of the filtration setup.I disagree on acrylic - I've owned two in the past and much prefer them. I've also had sump setups in the past, and while they're obviously better for usability than an AIO, I do like my current AIO. I am not using anything made for a biocube, mind you, and haven't needed a skimmer since I put a fuge in the back.
For something like a Red Sea though, can you actually put a wooden canopy on the rimless tank? I haven't seen anything saying whether that's safe, either way. The stand being wood is fine - not worried about that, but have to have a canopy on the tank.