>>51098135Quickfire TK
Mechanicals aren't that quiet by default, but if you go with a non-clicky switch you should be fine.
You could also install o-rings, but that'd mess with the backlighting.
Otherwise, the matias quietclick keyboards may be of interest to you, but those don't come with backlighting and you won't find a huge amount of aftermarket caps either since the switches are alps variants.
I'd recommend you clears, but I doubt you'll find a board with those for under a hundred bucks.