Yep, I tend to be pretty liberal when stocking and I don't mean to come off negative. BUT Greg is right when he says you need to research your fish first. I carry around a book in my car that has most fish listed so i can look them up on the spot if I see something I like in the store. I got caught up once and bought a scooter not knowing they needed pods
like a mandarin. Luckily I got him to eat regular food and it didnt end in the fishes death.
Tangs are the most popular fish out there and everyone wants one. But you really have to consider the tank size as well as other things before getting one. I wanted one when I had a 55g but I ended up waiting after ALOT of people here urged me to do so. And now I have a 6 foot tank and 3 tangs that are huge and fat and happy and healthy. For me it's all about the fish.