I have a Unicomp Spacesaver that I've been using for the past several months. I love it, and the RSI I had from before I started using it seems to have diminished significantly (although I have changed a bunch of other variables). It is even hard to go back to the built-in keyboard on my 13" Macbook Pro (so mushy).

People often comment that the Unicomp is loud, but no one has complained. More like "that's legit."