But the narrow question I have is for playing my cd collection: whether having an all in one player alleviates the concerns with the connection from the transport to the dac
Well, if you’re going the streaming route anyway you could consider getting a streamer like an Innuos Zen Mini or Zen that also has an onboard disc drive and internal storage so you can just load all your CDs directly into it and have access to all your music from your chair and no need for a separate transport. Just another option to consider FWIW.