I am going for PS3. Sure it's pricy, but consider what you get:
PS1 & PS2 compabilty, Blue-ray drive (Stand-alone costs a lot more than ps3), free online gaming service, Downloadable bonus content, 20/60 gig hard disk, Bluetooth & a lot more.
PS3 got the best specs. But what is importent is exclusive games.
Me, I like Final Fantasy, that's why it's gonna be PS3 no matter the cost. But I would also like Wii, if iI got any cash left.