i think it depends on what you want it for.
I hardly game much on my PS3. I use it to make slideshows from vacations, all my music is stored on the PS3, which is linked to my receiver.
I love the blu-ray feature.
Also would like to mention the PS3 can up-scale a regular dvd, making it look better. It also does a great job at playing mp3s.

My PS3 is also hooked up to my PC wirelessly. It sorta does everything !

I would also look into the failure rates of both...

http://www.gamespot.com/news/6216691...0-wii-27-study