I always wondered about the effectiveness of the o-rings to use with my reds. Thinking about getting blues and just using this keyboard at work if it just wasn't so loud when bottoming out. Brought my keyboard once to work and it went fine as I was sitting in the corner of the office but now work right in the middle so would noise is a bit a of concern for me.
Eventually I want to get a Topre for work, but I currently use an MX Red with O-Rings and it's not very loud at all...not any louder than your standard rubber dome anyway. I ended up adding them to my daily driver at home which is also MX Red since I have open headphones, and it helps reduce the bottom-out noise quite a bit when gaming Any of the clicky switches will be much louder even with dampeners, but a board with MX Red, Black or Brown would be idea if you're trying to keep noise down.