Yes I have a 6 foot tank. I have a TUNZE wave box, as well as a TUNZE Jetstream(non controllable), and TUNZE Powerhead(7140?). I also run a mag 18. I have the controllable powerhead plugged into my wave box converter. That way they both turn on and off at the same time to create a massive wave. I have the jetstream faceing the wave box, and the mag return faceing the wave box, and that thing still produces waves. Do not get me wrong some adjustments to the frequency have to be made butt nothing speacial. It still wants to spill waves over the edge.
I have always owned a TUNZE, and always will. They make top notch stuff that no one can compete with. It would be a good move. I was thinking about an ocean motion, butt came to the conclusion that if you are trying to conceal plumbing, etc then the TUNZE is the way to go. The OM would require some plumbing and since you are trying to hide everything this wouldn't work. Plus the plumbing takes up critical space that your sump, and fuge could use.
Sorry I will step away from the keyboard butt I hope this helped any.