Sprout

Firstly, you will almost for sure get better speaker quality from a separate unit. As air purifier companies...aren't gonna know anything about speaker quality. And you have air rushing through the device which might contribute to messing up the sound. And I don't know how you would put that in the

Here In US we don't have Phillips so much, so I've never had one, although they do some popular/common in posting in here and are probably OK. I have multiple Levoits though and love them. As for being quiet in sleep mode you might want to look at th Levoit unit sprout, that is more for a nightstand