Well, dag. If you're getting a 240g, what's the debate? Look at my signature... now, how about a deal on that 75 for me? lol.
In reference to your situation - if you have to wait more than a year for that 240 (not knowing when you would graduate), you may want to separate one into a smaller tank for the short term... Maybe put the tern in a 40 - 45 by himself until you can reunite them in the 240. My boy has a 240 and that is a sick sized tank. You may want to just get a whole new shoal of 10 or 12 for that.