I have two of the 36" sat + on a 210g (6ft) that is 24" wide and 29" deep and it does just fine providing a nice bright tank. It has so many things you can do to tweak the color that I think you would be happy. Ive seen the monster ray and it is totally weird looking without an additional light to tone it down. The Finnex stingray looks pretty decent but I think you should just do the Sat +
