Wireless file transfers with ANY media player would be the same, because it doesn’t have much to do with the fact that it is a media player, because if you were transferring from a PC drive to another PC drive, wirelessly, the time it would likely take is the same. So, your concern should not be a deal breaker for the WD or any other media player. If you think you can get “instant” file transfers from any gadget, you are under the wrong impression.
For the money, you will not find any better media player than the WD – careful shopping can get you an SMP for under $100. The Hub (with 1TB drive included) can be found for under $200. If you don’t think you want or need a WD unit, especially one that streams from external sources, then you probably don’t need a media player at all.
Any decent media player has streaming. Anyway, how do you know you would not want any streaming media? You haven’t tried it yet. Netflix is only one kind of streaming media; so if you don’t want that, there are dozens of others that are free – how about radio? Have you heard of TuneIn Radio? The WD has this feature, and you can “tune in” any radio station in the world, plus other streaming audio! Do you use YouTube, Pandora? They are on the WD unit, and are free.