I would personally suggest a KUL. They are easily some of the most solid keyboards I've ever come across, utterly built like tanks, and heavy. They also have 7 dip switches which means they have the most layout customization of the lot. KUL now also sells replacement top shells for relatively cheap, which is nice if your into custom keycap sets as you can easily match your board and make it look how you'd like.
I have 3 KUL's and have never had any issues with any of them. I have a Novatouch, Filco TKL, QFR, as far as directly comparable keyboards and it is easily my favorite of the lot.