What would it take to make you buy one of the other consoles that you don't currently own?
For example, I'll get it started.
I own a Wii, but I'd buy a ps3 if it were say $299(CAD) and still fully backwards compatible with the ps2
Just kind of an interesting game to see what it is that prevents you from buying a rival's console....try not to be negative, like "I'd buy a 360 if it weren't crap" or something non-constructive.
The only teeth strong enough to eat other teeth.