Awesome pics!! I'd go with either the 2nd FTS from your first post or the 4th one down in your second post :) And how long have you had that monti? It's incredible!
I just switched over to a 6 bulb T5 fixture with supplemental LED lighting, but pervious to that I was using a 4 bulb fixture. I just wasnt getting the color I wanted and I have always wanted to have a collection of all the different clam species, and I was afraid that my old lighting wasnt going to allow the more picky species to flourish.