Hi there.
At work, I often switch between:
- IBM Model M
- Das Keyboard III Model S
- Matias Tactile Pro version 1
At work, we all sit in the same office (about 7 of us) and not once have I been given a complaint about the noise I make whilst typing. It's fair to say each of the above keyboards give a distinctive sound, but as many have said, you often don't notice it. People talking on the phone, or to each other, is more of a distraction. You just get used to noise of the keys.
Plus, as a developer, I like to use keyboards that make my job more pleasurable due to the amount of typing I do. Mechanical and buckling springs are my choice of weapons when it comes to keyboards. My advice would be to use whatever keyboard(s) you want. I doubt anyone will really give s**t.
Cheers.
Jas.