Having tried both the Meka G1 (my friend's) and the Majestouch 2 w/ Blacks (mine), I must say that the Meka is close in build quality to the Filco. The USB and audio ports give it an edge in features, but in build quality, it's not quite as good. I'd say it's just up there right below a Das Keyboard.
Granted, this is my personal opinion, if the MG1 is the best as far as you're concerned, then rock on!