keyboards; recommendations sought
Not really answering your question; but in the hope it can help:
I try to avoid typing out of a desk; you can't get good ergonomics without a good desk (and a good chair!). And tactile screens are terrible for tendonitis; the bigger, the worse. Pay attention to your back and neck, tablets are terrible for that, too.
If you can't avoid it, be extremely careful and do frequent rests; it can get very serious, very fast.
About keyboards, the more old fashioned they look, the less troublesome they are (flat ones are pure evil).
My experience seeking mice is test many, buy (or keep) the ones that feel good (they're like gloves: they must fit your hand). The perfect mice for somebody can be terrible for you.
About keyboards, I don't type so much; pain usually comes form touch and mouse, so I haven't researched so much.