What do you mean by a 'powered' ethernet switch? Are there 'non-powered' ethernet switches out there?
Initially I thought you were referring to powerline adapters, but I don't think that's the case.
For my audio network, I have all of the relevant and needed audio, NAS, and computing components connected to a single switch that is powered by a Teradak LPS. I use a 100 Mbps switch during playback (I have multiple gigabit as well that I use during transferring data).
You are free to use whatever switch you want and can easily have a few jumps between switches. Don't worry, your music will play just fine without any hiccups and all of your data will get there just fine. However, with respect to SQ, you may first have to experiment with whether making changes in the network layout makes any difference in your particular system or not. If it doesn't make any difference, use the setup that's most convenient.