Potzato: I have a corsair K60, my contacts on skype believe I use a typewriter. Reds are not quiet.
iippo: Do you press buttons hard and are your mic options at too sensitive?
I am pretty certain reds are as quiet as you can get with mechanical keyboards. unless you remove every single key and add some o-rings (i belive like this:
http://www.wasdkeyboards.com/index.php/cherry-mx-rubber-o-ring-switch-dampeners-125pcs.html#ad-image-0)
I heard of the O-rings and it might be worth the investment on the occasion, but I don't mind the noise so it is really not a priority.
Otherwise I have to admit that before using a mechanical keyboard, I only used "low profile keyboards" (laptop style) so I had the habit (and my skype contacts too) to not hear the slightest noise from my keyboard until now.
I indeed read that the MX blue make more noise, but my point is that it can't be said that red are silent, not on my keyboard.
Edit : my answer for OP about the opening of keyboards, mechanical ones aren't really "openable", it's just that the keys are "movable" (the cap can be removed from the mechanical part) in order to replace the key-caps, put O-rings, clean the keyboard (which is really useful) .....
Edit2 : [url=http://www.everythingusb.com/images/list/corsair-vengeance-k60-keyboard-top-rows.jpg ]explanatory picture [/url] (on my keyboard the "Esc row" is not mechanical, nor is the "Suppr square" fyi)