Streaming: WiFi or wired??

I've ran my old Squeezebox Touches both wired and wirelessly, and have done the same with my current Raspberry Pi players.

As others have said, as long as the wireless signal strength is good, I find no difference is audio quality nor the responsiveness of the player in starting and controlling music. Wired is a little easier to set up if you are close to the router or switch and can connect with an easily concealed cable, but I have no problem switching to wireless if that means I don't have to run a cable between rooms or leave wiring exposed. Point is, don't waste time worrying about it for audio.

Two comments.

First, @guy-incognito, regarding how much sense it makes to install better cable than your ISP service speed needs, keep in mind that upgrades do happen. I recently went from 100Mb internet to gigabit and had to replace two runs of old Cat-5 (not Cat-5e) cable in order to get the new speed at my desktop. If I hadn’t been quite as cheap with the cable back when I got 12 Mb DSL, I could have saved myself some work this time around.

(Of course, I started at 300 baud in roughly 1980, so that’s been quite a change in connection speed over the years.)

Second, @snowbuffalo, crosstalk in ethernet cables has nothing to do with crosstalk in stereo separation. Ethernet cables have 4 pairs of cable inside them and they are talking about the interference between those pairs (crosstalk). There is no stereo separation in a digital signal until it is decoded in the DAC. Only then can you have a stereo separation problem. Cat-5e cable can do gigabit speeds without problem, though Cat-6 might be better for long runs or a particularly noisy EMF environment.