I am fairly certain that several of the replies above asked what tank they were going in, its only natural that someone would assume you plan to put them in your 280G since you did not mention any other tank plans.
Personally, I would not get any until you have the 10 x 3 tank built, the "it's OK, I will upgrade later" response is typical when anyone is informed that the fish they want is going to be too big for their tank. Get the tank first, then get the fish.