Bill Wilson dislikes the keyboard that comes with Intel Mac Pros, and bought a Matias Tactile Pro 2.0 USB keyboard instead.
The Tactile Pro is designed around ALPS mechanical keyswitches that provide great tactile feedback.
From a 20-in. aluminum iMac to a 2.4 GHz, 15-in. MacBook Pro (2008) and 2.93 GHz iMac (2009)