Pick one of the following PS3 games for me?

I need help choosing a great open-world game for my PS3 even though I have a lot (Skyrim, GTA V, AC, Batman Arkham Series, inFamous, RDR, etc.) So which of the following games should I definitely get?

GTA IV: Complete Edition (comes with all the DLC and original game; I've played GTA San Andreas and GTA V)

Saints Row The Third: Full Package (i heard the game was really fun and comes with all the DLC as well)

Assassin's Creed IV: Black Flag (i've played all other AC games except this and AC: Rogue. In Walmart, AC4 and AC: Rogue come in a bundle for $60)

I will eventually get all of these games but I need to pick one for now. Please tell me what game you chose and why you chose that game. Also tell me which game(s) have the most replay value and most stuff to do basically.