I think the last time I tested with the previous generation Pacific Suns, the upper portion were in the low 600's.
Have not measured the PAR level for the XM Metis fixture yet.
You mentioned earlier not having so much luck with the Oregon tort. Have you had an opportunity to try O.T. under T5 or MH in your system? Did your O.T. frag recover? I'm interested in the Pac Sun Metis, but am terrified of the thought of losing my large O.T. colony. Might you consider trying an O.T. frag under your Metis?
If you have time I'd love to talk more about your LED experiences.