It's gotten to the point where bottoming-out and upstroke clack noise really bothers me. I've become spoiled by silenced Topre swtiches, Matias Quiet Click switches, and MX pinks. None of them are literally silent, but they are damped to the point of being very pleasant to type on, compared to their non-damped/non-silenced brethren. Consequently, I couldn't in good conscience recommend MX browns until there is a silent/damped version of that from Cherry. Rubber o-rings only barely help with bottom-out noise, IMO, and they reduce key travel too much in most cases. And there's nothing to be done about the upstroke noise. MX switches need to be properly silenced inside the switch housing to be truly effective, which MX pinks are, but no other MX switch is. At least with Topre switches, installing silencing rings (if you can't get them silenced from the factory) is an easy, if tedious, operation.