I have heard that foxfaces can be very nie additions to reef (or future reef) tanks. My concern is I do not want to get a fish that is going to be cramped in my tank. I have a 120g tank that is of the 4 foot variety. I was thinking either a foxface lo, or a one spot foxface, specifically because they run at the smaller end of that type of fish. I see they run from 7 to 8 inches adualt depending on the source. Is ths a good long term fish for my tank?