PS3 looks like it could have some cool games but the cons outway the pros. Blueray is almost destined to fail and the lack of a ventilation fan means you don't just have an oversized burning hot machine, but one that crashes up to 3 times a day aswell. Doesn't sound worth the price tag to me, particularly when you consider how nearly all the decent games will come out on Xbox at the same time.
I'd recommend a Wii above all else but i'm aware it's an acquired taste for some people. All I can say is Nintendo won't screw you over in the long run. With a Wii, your set for life. :D Otherwise, good ol' 360 in second!