[sp332]

Have you tried a keyboard with the MX Cherry Browns, instead of Blues? They say they have very similar tactile response, but the browns don't "click" so loudly. http://www.daskeyboard.com/model-s-professional-silent/

[jbl]

The browns are still pretty noisy for a quiet office environment. My vote for a mechanical keyboard with good feel that won't disturb workmates is the Topre line.