I have the AirStation N600 Buffalo router.

It's kind of annyoing that it comes with DD-WRT preinstalled, but it's half-assed and is not configured for easy modification.

I have not taken the plunge yet, because I do not want to deal with jtag cables if it bricks, and the whole "install our binary, and then do not even breathe in the direction of the router for 10 minutes" part does not inspire much confidence...