I have this game on the Xbox 360 and it's a definite must buy and is amazing online but as the PS3 version was released at a much later date than the 360 version, the PS3 promised to have further improvements graphically and other aspects.
The game is now available for just £22.99 including free recorded recorded and same dispatch, whereas the next best price is £16 more expensive at £38.95.
Don't forget to go through Quidco to receive a further 4% cashback, making this title around £22 all inclusive.
Hope that helps. :)