since I'm networked, is it even worth it reripping what I already have?
If you use a networked converter, such as Sonos, Logitech or PSAudio, then the data is the data. The core audio stack is not involved. Therefore, music format is less likely to affect sound quality.
When you involve the core audio stack on PC or Mac, then the latency issue raises its head and SQ starts to suffer with compressed formats. All of the compressed format CODECs that I have heard compromise SQ because they cannot keep-up with the data stream, at least that is my theory based on experience with them.
I think the networked versus non-networked is one reason why some heard SQ differences with FLAC and others dont.
Steve N.
Empirical Audio