To be fair i've had both, not matter what anyone says X box is shite, like Wheels i had 4 that all RROD because of cack soldering and dubious heatsinks, swapped to ps3 a few years back and this is the first problem I've had and to be fair its not hardware related its software. That and i couldn't afford a ps3 when they first came out (£500) so had to opt for MS
Downside with X box for me is the spaccy shaped controllers and rip off sony analogue stick and the fact you have to pay for live, the wireless dongle on top of your inital broadbanb subscription, its like anything microsoft money money money. I'm not a ps3 die hard and have probably used it twice this year.
I suppose its a case of each to their own