I dunno, I think this should last me. G80 for my room computer, Model M for the workshop, G84 for travel, and an MX11800... I might sell that one, or keep it as a spare.
If I were to get a new keyboard it would be one of the expensive, nice boards. Filco, Das, Deck, Ducky, I-Rocks, Unicomp... At most I might get a keyboard to try out MX blues, but I think I'm set for the time being.