Welcome to Aquarium Advice pm64971 (gosh I sound like a machine!)
well that's a hefty request indeed. THe good thing is you do have a specific goal in mind. As far as what exact equipment you'll need, each person is likely to give you a different answer as much of it is opinion based in the way of brands etc (so be prepared)
much of this is still going to be up to you, we'll point you in the right direction but I don't think you'll get a straight forward shopping list. Plus, I think it will greatly help you to understand how to properly care for your tank once you know WHY you need the items we suggest.
obviously, you will need a tank... the options here are glass vs acrylic and, the biggy, what size to get. Here are the factors to consider: What's the tanks purpose, and special needs fish? Well if your going for a reef set up, water movement and pristine water quality will be high on your list so you will likely want to go with acrylic so it can be drilled for plumbing. Now, what size? you stated you would like to put "a few tangs" in there. Tangs are energetic swimmers and need a good amount of horizontal tank space to really feel comfortable. Most will suggest at least 4 feet wide at a minimum, others suggest this also may be too small. Also consider how many fish (of any type) you'll want to have in the tank ultimately. For SW
tanks, most give a RoT of 1" of full grown fish to every 3-5 gallons of water. So basically... the bigger the tank the better.. but the bigger the tank, the more of everything you'll need. literally.
once you have your tank, and a stand that will support over 10 times it's capacity in weight (eg a 55 gallon tank is over 450 pounds of just water, then you'll add 100 pounds of live rock and 150 pounds of sand giving you total weight of 700 pounds), you'll need those two things I just mentioned, live rock, as you want this to be a reef system. and a DSB
will handle the majority of your filtration. You'll want to consider the use of a sump or refugium. Consider a skimmer. You'll need enough powerheads to move about 10x your water volume per hour. and if you want corals and anenomes you'll need strong lighting. Depending on the type of corals and anenomes you'll need to decide if you want MH
lights or if VHO
lights will be sufficient. You'll need test kits to test for everything under the sun. You'll need a good quality salt mix, such as Instant Ocean, Crystal Reef or Kent, i believe are the most common used here.
And.. you'll need a book or two
, and, plenty of time to read these boards! There is a wealth of information here and a wealth of knowledgable and friendly users more than happy to help introduce you to this hobby!
Hopefully I've given you plenty to think on for a while. Please visit our articles section
for additional information to help you research what exactly you need.