Dude, Wii is the ONLY current console that has NOT lowered in price since it's release (except for in those days where it is like a sale, and you get it for 230 euros).
I know it sucks in Graphics, some GamePlay, and there are no good games on it, but Nintendo manages to achieve Originality, shitloads of sold consoles, and keep their prices teh same.
Now, i can SOOO imagine that everybody is like "WII SUCKS" and such, and i know it does, so im not telling you to get a wii, im telling you Nintendo does good opposite to Sony and Microsoft.
So, XBOX, PS, or PC, i would say PC, XBOX and PS get old and are not updatable (hardware), while you can change your Graphics Card if you have a desktop (but if you just buy a good PC you wont need to change anything soon).
My vote: No, buy a proper Gaming PC.