Nice, wish this would have been out before I bought my pair of Asus's to do the same thing.
To do stuff like this:
http://www.home-network-help.com/wireless-bridge.html I have an old house and don't want to run cable through the plaster and lathe walls from one floor to another. I got a pair of AC routers, one downstairs at the modem that I have a NAS, PS3, and Tivo plugged into. It also handles wireless for the rest of the house - phone, roaming laptop, etc. I got a 2nd identical router to keep upstairs, that I wired my desktop into, as well as a USB printer (old one without ethernet). Set the routers up to talk to each other (the one upstairs is in bridge mode) and as far as the desktop upstairs are concerned, it's like I actually ran a cable to the router downstairs. Speed is not as good as an actual cable but much, much better than any other option I know of right now such bridging an older N router or plugging in an AC rated USB antenna and hoping for the best.
I'm happy with the "Merlin's Build" for my Asus's, not sure if he does anything for Buffalo. DD-WRT or Tomato might too of course.