Out of all these PS3 Titles what should I get?

depends what u want in a game, if u want a good online game with a short campaign then cod4, what i would choose, the orange box i think has a long story mode, so if u like that then get that, street fighter is an aracde style game that is mostly for 2 player/ splitscreen, ratchet and clank, u kinda have to have played the other games to know what is going on, i personal love rachetclank game