@Johnny_of_the_swamp tiresome in typing?
those has mechanical keys, which are really nice.
i used MS ergo for 10 years, 2 models. The 4000 one has spacebar problem, got me into thumb problem.
the
Microsoft Sculpt Ergonomic
http://xahlee.info/kbd/Microsoft_sculpt_ergonomic_keyboard.html
is not too bad, if you don't type like data entry clerk.