Nice looking tank, to many bubbles for my taste but it looks good. Sorry to burst your bubble though but a motoro/motoros would not be a good choice for your tank since they will get too big. Even the 220 would be to small of a tank for a motoro in the long run. You cold only use each tank as a growout.
So if you want rays go with a retic or somthing you can keep in the 220 for life.