[dsp1234]

Cherry MX come in a spectrum on both tactile and auditory (clicky) feedback.

MX Blues are tactile and clicky.

If you want tactile, but not clicky, then you would want an MX Brown. You can feel when the actuation happens, and as long as you don't bottom out the keys, they are silent. Many DasKeyboard models come with a choice of Blue/Brown, but other manufacturers have them as well.

Here is a site that has an explanation of the various colors:

http://www.keyboardco.com/blog/index.php/2012/12/an-introduc...

[hfourm]

Brown + dampening rings should be plenty for an office environment

Edit: another thing that helps is having the keyboard on a oversized mousepad, to dampen the vibrations from keyboard -> desk