Looking for as silent a mechanical keyboard out of the box as possible

I much prefer the feel of a mechanical keyboard over a membrane type. However, I hate how noisy they are. I am also not into customising a keyboard - I just want to buy it and use it. I have tried blue, brown and red switches and realise it isn't the noise of the switch that bothers me so much but the sound the keys make when they bottom out on the keyboard.

What is the quietest mechanical keyboard I can get? I am ideally looking for a 96% version (the compact ones that still have a numpad) but if necessary will also consider full size and TKL. I would prefer to spend £100 or less but I am prepared to spend more if necessary to get a quiet one.