I find the Dell AT101W to be quite acceptable in an office environment, unless people are trying to be polite and not saying anything. The ABS M1 is a bit louder, not when bottomed out, but rather when the keys are springing back in their initial position.
If the Brown Cherries are like the Blue Cherries minus the click, I think they can be good candidates. Over time, you'll learn to bottom out your keys less and less or with less force if you do. Unless of course, you use a keyboard which require significantly more force at home and brown cherries at work. I used to bottom out my ABS M1 keys with a lot of pressure because the tactile bump is not as pronounced as the Blue Cherries. But, the more I use it, the better I'm getting at it. I used to type more than 85 words per minute and gradually moved to over 90 WPM on my Cherry. But, on the ABS M1 because I was using more force, I was spending more time on each key and my speed was suffering it (less than 80 WPM). Now, I'm around 85 WPM on it.