Ohhh sorry lol, 150 cubes arent that big of a foot print though, i would go with a normal 150 just personal preference as i already have a cube and it limits your stock to a bunch of small fish.
I know, but space is limited and I would only want a couple smaller tangs, fox face, mandarin etc. Who knows though!
Back on topic, OP maybe a mimic tang or white tail bristle tooth?