Which should I buy: ps3 or xbox 360?

I had a ps2 when it first came out and it was great!
But I believe now its time to upgrade.
I have no idea which console is better, so I hope you can help me out.
Also which would be best for playing movies?
Update: Also I would like to play game online for free, so I aint that sure if you need to pay for xbox live?
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