"1: Kinesis Freestyle VIP
This is my own personal choice in keyboard. It's the Mac Daddy of
ergo-keyboards. Not only has the keyboard been split in half, you
can adjust the splay (the horizontal plane angle) to any degree of
separation that the tether will allow. And with the addition of the
VIP kit, you can adjust the tent of the keypads. The tent refers to
the tilt of the keyboards. You can go from flat to roughly 10 to 15
degrees. You can even have each keypad at different tent angles and
different splay angles.
"2: Kinesis Advantage and Advantage Pro
If you can pay the price for one of these keyboards ($359.00 for
the Advantage Pro), your arms and wrists will thank you for it. So
will your back, and your shoulders, and your neck... This keyboard
forces you to use good habits. The keypads are on the outer edges
of the physical keyboard and rest in a scooped-out hollow, forcing
your hands to work in a near-perfect position."