I have no plans to buy one, but it's a good purchase to watch HD movies on alone.
The word on the street seems to be that 360 has a better game library than PS3. Well I've had my 360 over a year now and never once even desired to buy a PS3. So far 360 has been all I needed. And I keep reading from most sources that 360 games run better than PS3 games overall. Don't quote me on that cause I don't own a PS3 but I like to think it's true. :)