Is this a solid saltwater tank setup?

Sounds like you are pretty good on equipment. I didn't see any kind of powerhead or other means of moving water listed. Might want to throw some pumps in there to get some movement in the water column. As the other guy said if you are planning on keeping those corals or an anenome in there you are going to need at least power compact lighting. Remember these animals require light for survival. Other then that I might throw in some cleanup critters like snails or hermits as they will come in very handy with all those fish. My advice is just to go slow. Obviously don't add all of those fish in at the same time. You will want the tank to be fairly established before you think of adding the anenome and corals in. I might also consider not putting the tang in as they can get pretty large and require a good amount of swimming room which a 55 does not provide. Also don't ever dose what you cant test for. Make sure you have good quality tests. Good luck.