If it wasn't for the JRPGs, I would say PS3 hands down. But since I am a JRPG addict, they've made it a bit harder for me.
For now I would still go with PS3, but when I'm done with MGS4/MGO and all my remaining PS2 JRPGs (still half a dozen of them such as Persona 3 FES, Odin Sphere, and Rogue Galaxy), White Knight Chronicles and Final Fantasy XIII better be out.