Another mechanical key switch aficionado here. I prefer the Kailh 'blue' low profile switches. Beet reasonably priced TKL with these is the Havit HV-KB390L. USB not BT (my only beef). Low profile blues make a little click (not loud enough for anyone to complain - about the same noise you'd get from quickly pulling your fingers up from a scissor-switch kb) and very nice tactile feedback (I tend to pound on reds, just don't 'feel' I've pressed enough before they bottom). I've been giving my other mechanical keyboards away, still hanging onto one that came with the original IBM PC, partly for sentiment, partly because that engineered-in 'Selectric' feel is something I appreciate. Oh, and those aren't silent, either...