I have tried using cherry browns before and they were definitely a bit too loud for office use. The one I have now is the Durgod Taurus K320 with Cherry Silent

I have tried using cherry browns before and they were definitely a bit too loud for office use. The one I have now is the Durgod Taurus K320 with Cherry Silent Red keys. It sits next to my microphone which doesn't pick up my keyboard at all or very little. You might have better luck trying linear switches with low actuation force but I am not sure what your definition of mushy is. I am trying to decide if my keys might feel mushy for you. I am not sure. I nevertheless agree that the Microsoft Natural is amazing. I used to have the 4000 but it broke at some point. It's too bulky for me now though. I prefer TKL keyboards nowadays.