op
if you are truly ripping 3,000 cd’s maybe the innuos with built in/integral cd slot is more convenient
optical rendu >> ultrarendu for network noise suppression - if you go in this direction i suggest you wait for the optical rendu (search youtube for andrew gillis’ explanation of how/why it works, and works better than the lesser micro and ultra rendus) -- important point here is the rendus all take a home network lan feed and give you a cleansed usb output to drive a dac (like a qutest, or any other modern dac with usb input)
you can also search for ’uptone audio ether regen’ here or on the web, much is written... it is a lan signal cleanser - gives you a purified ethernet feed (lan, not usb) -- this is useful if using some streamer/dac combo unit as front end (i.e. a cambridge audio cxn v2), which take a lan input directly -- so then you want a clean lan feed
network acoustics (eno or muon) - their two models, they do the same thing, same thing as the ether-regen - but do it passively -- much written about these here and elsewhere too, just search
you don’t need all three (i have them all as i am off the deep end, like to have every option to feed different dacs, some with, some without streamers)... what you want is one form of well cleansed digital feed compatible with your chosen dac, so you use the properly chosen filter device to deliver that