The GF.2 U\'s are right now performing very well,doing well against GF.3\'s.And since nVidia has their unified drivers you won\'t have alot of driver problems,and nVidia\'s drivers are very good.
While ATi constantly promises better drivers they always fail to deliver,and that is the biggest drawback of the Radeon, while it\'s specs are lower than GF.2 specs it is more sophisticated,and has alot of potential if only ATi would unlock those potential trough better drivers).
Another thing to consider is that the Radeon doesn\'t get as much a performance hit in 32bit mode as the GF.2 get\'s.And image quality tends to be better than GF\'s (especially in 2d,where the only one that outperforms them in 2d is Matrox,which is un-surpassed in 2d)