Would help to know your tank size? You probably know many tangs need well over 100 gal. My bias is for a chocolate tang. I selected a chocolate because my understanding is it's appropriate for my tank size and I enjoy seeing the color change as it goes from juvenile to adult. Mine has tons of personality, laying on it's side to beg for food, pooping into the overflow like it knows its the toilet (really!). Juvenile is very affordable and I bet adults are under $300. What looks awesome is up to your personal taste, get what you like.
What I mean by fun to watch color change:
Juvenile
16mo later sub adult color