Which one should I buy? Sims 3 Late Night or Generations?

� already have ambitions and I would like to buy another expansion pack. I like the feeling of both of the expansion packs. I like the family part of the game but I like the feel of exploring the town and getting new destination options. My favorite expansion packs in sims 2 was Freetime and Nightlife. I dont know which one to get. Or should I wait and see what other expansion packs they are going to offer. I really want a sims 3 university -_-