I hope you are aware that "BNF" means that it does not include a transmitter (controller). "RTF" (ready to fly) means that it includes a transmitter.
Search the forums for these models. I have seen one review that concluded the Walkera was faster (more oriented toward flying fun) than most the other 350 size quads that are oriented toward stable photography platforms. But, do not take my third hand impressions as useful comments, but rather to spur you into your own research on the forums.
Important - does your father have experience flying helis or quads? If not, an expensive model may not be a good start. You might ADD a decent toy for learning to fly - like a Syma X1. Fraction of the cost, fraction of the quality, but good for learning basic flying skills. Two helis for the price of one nice gift. (maybe?)
Good hunting, and I think your father is lucky.
-Howard