I've got both consoles.
Again what it comes down to is what you want your console to do ?
Want games you want to play or exclusive that are on the console format e.g. halo 3 or gran turismo ?
Do you want to have a console which your mates have because you can borrow games or play online ?
Do you care more about the multimedia functions ?
maybe this can help ?
Do you like online gaming, fps, better version of the multi release format of the games ? go for xbox 360.
Do you prefer a cheap bluray player, multimeda functions as divx, semi computer features like linux & lazy programming of multi format release games? go for ps3.
I may sound like i'm praising the 360. but i have two set of friends, my work friends all have ps3 & my social mates all have 360.
My work mates are sony fanboy, they think that the ps3 is better better then 360.
While my social mates who use to buy sony consoles switch to 360 because all they want to do is just play games & didn't care about the ps3 multimedia features.
Me personally I love games so i have both, even if i did go through 2 xbox 360 which died to the ring of death.
If i had to choose between the 360 or ps3, i would choose the 360.
At the end of the day its up to you.
have a look at this link it might give you an idea
http://uk.gamespot.com/features/6191251/