Get a wireless rubber dome keyboard that looks neat to you. Also check out reviews on Amazon.
Topre are about the same volume as a regular rubber dome switch.
The only switches that might be "too loud" for office use are buckling spring/MX Blue/MX Green.
Though at one time buckling spring was the normal keyboard sound in the office.
why do you rec. a rubber dome kb?
I will give 'the speech' and just imagine Ben Stein is the one saying it: blah blah blah, 'this is a keyboard enthusiast website, and therefore the bias should be toward all things keyboard, and not necessarily thread crapping on rubberdomes blah blah blah.'
I happen to completely disagree with the statement above, but I have been lurking and posting here enough to know it by heart...
Lol 
) -- I do agree with being open towards all types of keyboards though. Staying with rubber dome was something that had just not crossed my mind so other than for price, I was really curious if there was a benefit... However, I can see how this thread could quickly change if we venture down that path. 
There are some good rubber dome keyboards out there. The only drawback to the better ones is that you can't swap keycaps on them to customize them or wash them more easily. The plus is that there are a ton of them in many styles and configurations. Rubber domes may also be a technically better switch because they do what a switch should do:
1. Actuate near the top of the key press
2. Provide enough resistance to prevent accidental key presses
3. Decrease in force after key press
4. Have reduced force at the bottom of the travel for holding keys down more easily
5. Have a cushioned bottoming out
The 3 million vs. 50 million keystroke durability is bogus. I've never had a key go bad on me on a rubber dome keyboard, even after using one for 15+ years of intense gaming. On the other hand, I've had multiple mechanical keyboards fail, usually developing controller board problems. There's nothing bad about rubber domes other than the badly stabilized ones binding when pressed off-center or wobbling. The squishy feeling at the bottom actually reduces finger/wrist strain and is usually very similar to that on Topre keys. See if you can try the keyboard out first because rubber dome keyboards are much more diverse than mechanical keyboards in terms of key positioning.
The keyboard that will be best for you is the one you'll have the most fun with. I like Topre, rubber dome scissor switches (the longer throw ones), vintage MX Black (very smooth), and Cherry ML (they're fun to press, but they do bind when you press them off-center).
If you're dead-set on getting something everyone here would approve of, I would wait for Cooler Master to come out with their Topre keyboards that accept Cherry MX keycaps and get it in 55g uniform weighting.
