I have a Noppoo Choc Mini. It's on the quieter side of mechanical keyboards (Cherry Reds). It's more of a typing/gaming keyboard, but I can still type 110+ WPM consistently and without pain. http://www.amazon.com/gp/product/B0091QOCNA/ref=wms_ohs_prod...
If you're looking to reduce RSI/wrist pain, I found that far more important than a keyboard is your posture and arm position. More or less: http://www.egodevelopment.com/wp-content/uploads/2008/03/4.j... (I would actually have my monitor a tad higher than in that picture)
