The Wii, in my opinion, is the best of he three latest. PS3 is too overpriced to be worth it. Xbox 360 is a fragile and buggy system, though it does have a few good games (Bioshock, Halo 2, GTA IV); but the Wii is an all-around winner. It's the only true next-gen system with the wii remote and game design. Sure the graphics aren't the best...if you compare them to the PS3 and Xbox 360. I don't. I compare them to the Gamecube. The small handful of good games it is is similar to the handful of good games the other two systems have. Honestly, how many people only wanted the PS3 because news of the FF7 remake was out? I, personally, have about 7 Wii games and over 20 downloads.
So ya...the Wii is definately worth the $250 you'll shell out.
Heck...if it's anything like the Gamecube, you can use it as a frisbee when you get bored with it and still come back to play it in perfect condition the next day. =)