Lately, I was able to get my hands on a used/refurbished WZR-1750DHP. Amazon marketplace had it in virtually new condition for under $90. 512MB of memory and dual core SoC made me think that it could be worth it.
The original Buffalo firmware, while nice, was a major PITA straight from the 90s; almost any config change required a reboot. Turns out that Buffalo has WZR-1750DHPD, which essentially is the same thing with a nicely done DD-WRT firmware. It turns out that it's relatively easy to flash the Buffalo-supported DD-WRT firmware onto WZR-1750DHP.
After loading Buffalo-supported version, the router turns into a far superior device than almost anything I had before. The only con is lack of the external antennas for extended range.