Between 360 and PS3, I would say that to me, the 360 is a better gaming console. Between the two, the 360 has the exclusive titles that I want to play (until Last Guardian comes out), and a much nicer controller design. However, God of War 3 will be appealing to most people when it comes out, and it's a Sony first party game, and the PS3 is a very powerful media centre, allowing you to play Blu-Ray discs.
The only advice I can give is to ignore everybody who foolishly tries to debate which one is "better." Look at the games library, look at the features, and decide which one is right for you.