[mattbriggs]

Happy hacking uses topre switches, which are about as high quality rubber dome as it gets, but you really pay through the nose for them. Das uses cherry mx, which are spring buckling switches (like the model m), and are much cheaper then topres, even though they cost more to produce. I am also a big fan of cherry switches, but I know many huge keyboard nerds who swear up and down that topres are the best there is.