Look at PCB mounted brown cherry Keyboards. They are significantly quieter than plate mounted brown cherry keyboards.
Best feeling brown cherry is the "ricecar spos" listed on didjamatic's auction (g86 blah blah) He may be the only live source for these, and there probably arent that many around (maybe 50?)
They layout of the ricecar spos is wonky, I have to use autohotkey to remap keys on it so I don't go insane with it. See my picture under my name.
The big brown cherry board listed by didjamatic, I have used these kind of boards (the large POS boards) they aren't good, cause they sag in the middle due to PCB flex. In my book it's a big thumbs down I wouldn't recommend it.
G80-3000 from datacal is a good choice. I have something almost exactly this (I have the g80-3000lscrc-2 with brown switches swapped into it), it's a very good board, just full sized is all.
Consider the Mx11800. Most people don't like the layout of the mx11800, and the keyswitch and keycap feel is much better on the ricecar spos.