to me the XBO360 and PS3 seem like a better choice... One has Blu-Ray and the other HD DVD (via add on).
The fact that is the Wii is impressive, but the last thing I would dare buy. It may look nice and sport pretty neat features, the whole Wii-mote thing and all... However, the max Resolution of 480p and the lack of ability of even playing a DVD movie, that right you CANNOT even watch a movie it, it's pretty much strictly a Gaming system plain and simple, the graphics aren't even that great, it's just a revision of the GameCube to me.