I'm looking out for certain PS3 games that are cheap and right now my choices are the Sly Collection and CoD: Black Ops 1. I've never played either game in each series and my question is which one should I buy first? I'm going to own both down the road but which one will tide me over the longest until I get the other? Price is a factor as well, so if they're are any good deals let me know too :3