Nice tank and good progress. Glad to see you're taking it slow. I would recommend moving the Vortech somewhere higher so you corals can get more flow.
Nice work! Who's your lfs?
Manhattan Aquariums on the west side. They have been really helpful and I'm lucky enough to work right around the corner from them.
Congrats on getting a standard 50 gallon. It's a good size, though not easy to find.
As for your lighting, I can tell you that montiporas, whether shelving, branching or encrusting, will do fine with 4 t-5 bulbs. After a year, I upgraded to 6 bulbs, and I did see a little improvement in coloration, but growth is about the same.