The better the streamer the less the network matters. Put all you can into the streamer unless you like playing with your network for fun.
I couldn't disagree more - spending a few bucks to set up a solid network is one of the best things I've done for my system. That included paying an electrician to snake an ethernet line direct from my computer room to my system rack which is on another floor of the house. That lets me keep the potentially noisy cable modem, router, and network switching well away from the audio gear. It is amazing how an experienced electrician (or first rate cable or alarm installer) can fish wire through walls and I think it's worth every penny. Plus it yields a neat 'n' tidy installation.