i maybe biaseed since i've had the xbox 360 since it came out in the US, but it depends on what you want to do right now.
if you want to play high def movies, then the PS3 is for you, since their cache of games isn't that good. but their blueray dvd player is very nice.
if you want to play video games either online or offline, i don't think you can beat the 360. they have a great cache of games out now and for the next year, plus you've got Halo 3 comin in 3 weeks. plus you can play online with xbox live which is the best reason to get the 360.
i'm even thinkin of gettin the elite 360 for the ME so i can buy games here.
also check out
www.xboxdubai.com