Hey jpa - I have some pix of the Sfiligoi in my badly needing updated build thread (little red house). You can also see the saga of my Infinity there. It lasted a long time and took a few pages on the build thread. I do have pix with the Photon that need downloading - I'll get to it soon! I really, really, really need to update that thread.
My tank is 64x32x24 and the 48" Photon is PERFECT. If your tank is 6 feet you might consider a 5' or 6' fixture. The Sfiligoi Infinity isn't a bad fixture, I just wouldn't put it in the category of the others mentioned. I thought I saw some for sale on the AO forum.
Sorry for the hijack.