That has been my biggest re-learning curve - but with only the 6/7 numeric keys (which, apparently I use often) - the one thing that I would have loved with the Kinesis RGB Edge, would have been a dedicated number pad on the right-side.
>Another is key action. You want proper mechanical keys.
Kinesis RGB Edge allows you to choose which "cherry mx" mechanical keys you get when ordering.
(I sound like a shill - but, I am very satisfied after a month of ownership - pricey, yes - but well worth it)