I can also vouch for Cherry MX Browns with the thicker dampeners on them. You'll notice the whole keyboard feels quite a bit "mushier", which almost defeats the purpose of having a mechanical, but it's still better than dome switches.
Alternatively, if you want an actually silent keyboard, you have two options, not mutually exclusive:
1) Get good at touch typing. Even someone using blue switches can type inaudibly this way.
2) Get one of these abominations or one like it.
EDIT: For mice, I can't really say I've ever seen a quiet mouse that won't cramp your hand. Logitech's tiny portable ones perform okay and click quietly, but they are TINY and hard to use for more than half an hour at a time.