You could always do the o-ring modification to reduce the noise a bit, the noise is mainly when you bottom out the key and sounds worse on the Cherry Reds Blues and Blacks the Browns are the best for typing.
Originally Posted by LosOjos
OcUK Tech Labs Noise Dampening O-Rings for Cherry MX Keyboards - Black - 125 pieces [GAZU-082]
I have a Filco Ninja with brown switches on my main rig at home and a membrane kbd at work. In terms of is it worth it? I'm not sure I could sign off an order for one at work but the difference is positive enough that I might just supply my own.
In terms of noise they can be quiet. you don't need to bottom out the key, contact is made half way.