Sounds great!! If I were you, I would pick a couple of "must have" fish (hopefully somewhat compatable with each other) and then make the rest of the stock list to fit around them. Since you are asking for opinions, I think a few good feature fish to consider would be....
Male and Female Crosshatch Triggers
Any of a number of Acanthurus Tangs I love....Achilles, Bariene, Sohal, Dussumier, Spotface to name a few
Large Angel....Emperor, Passer, Queen, Maculosus, French would be my favorites
Brazilian Dragon Moray or Goldentail Moray Eel
My 2 must have fish for my 240 were Sohal Tang and Emperor Angel....I currently am yet to attain either.
What am I thinking!?!
Good luck
Oh, and the bigger the tank, the more the options.
Oh, and if someone chimes in telling you to do 55 triggers in one tank, just ignore him....He won't go away, but just ignore him