Well, if you don't have a PS3, I'd recommend getting a 360.
PS3 has few good games out, i.e. Metal Gear Solid 4, Heavenly Sword, Little Big Planet, and Virtua Fighter 5.
Even then, Heavenly Sword is a God of War clone, Little Big Planet isn't out yet, and Virtua Fighter 5 is ALSO for the Xbox 360.
But Metal Gear Solid 4 is one of the greatest games I have ever played. And I've been gaming for seven years.