I'd get it on PC honestly. The demo has barely been out a little over a week and the modding scene is already going full tilt on it and has picked it apart completely. The full game is out in a few days. People are also complaining of screen tearing and low FPS on consoles. Also, there's of course no PhysX on the console versions either which affects the physics of objects, explosions, debris, clothes, etc.
You can download the demo via Steam.
http://www.facepunch.com/showthread....53578&page=121
The PS3 version of Mafia 2 is very inferior to the other releases because it is a bad port by a Vancouver company. It has much more quincunx blur filter applied to it, has no multi-sample antialising, and is missing a ton of alpha sprites and features like grass!
http://imagequalitymatters.blogspot....s3-vs-360.html