Should I buy infamous 2?

I just finished the good side in one day just renting it. So that will take half the game for me. I really loved the game but it was short and I'm wondering If i already finished it one time and finished the evil side in 3 days what else I could do. User generated content doesn't catch my attention. And if not what other game should I buy thats fairly new and has multiplayer or at least a longer story.