I really want every Avenger set. And that X-Men/Deadpool set (though Magneto isn't too impressive).
Monetary-speaking, though, I shouldn't really get anything until I get an established job after graduating.
Were I to, however, buy some, I would probably start with the Avengers Jet and get Thor, Black Widow and an unfortunately large-headed Iron Man.* Somehow getting Cap to would be cool (and maybe Hawkeye, Loki (for the helmet! Why doesn't Thor have a helmet? ) and the Hulk). Perhaps I'll also get the Avengers jeep with Loki. But my second purchase would be the X-Men helicopter set, definitely for Wolverine and Deadpool. (But where are my other uncanny and astonishing X-Men characters??? And where is Spider-Man and plenty of other DC heroes???)
We'll see what kind of deals I can score.
*Seriously, why didn't they just give him a normal head?