I have a Ps3 and i want to buy a new game which one should i get?

Which game really show off the power of the ps3?

in this case:

Uncharted, MGS4, GT 5: Prologue

I would extremly recommend Call of Duty 4: Mofdern Warfare, then would come Metal Gear Solid 4: Guns of the patriots. if your not a hardcore gamer or you dont like MGS series go with CoD 4, plus online play is very satisfying ( I prefer MGS4, the thign is the game doesent suit everyone IMO)