It all depends, here I'll lay it out like this:
You want a PS3 if:
You want a bluray player
You like intense graphics
You like more intense single-player games
You don't mind dropping more money
You have a HDTV to go with it
A wii is better for:
Less expensive
More fun to play with groups of...
What celeb would are you most attracted to?
and also
What celeb would you ideally want to look like yourself?
I'm just interested in seeing a wide variety of answers, I thought it was an interesting question. Also, only pick ONE for each, there's a challenge :D