"But given that streaming from iPhones and other mobile devices seems to be more of the current thing,"If you are going to stream music from an iPhone then I highly recommend the Peachtree Nova 150. Should be similar or cheaper price to the 2 units the OP has listed.
In the past I would never have listened to iTunes on my stereo system. The only reason I had iTunes in the first place was someone gave me a gift card for iTunes so I tried it out.
Recently my Sonare SonicOrbiter went on the frits and I could not get music from my server to my Peachtree which is located in another room. So I decided to try the iTunes library that was on my iPhone. I was surprised at how good the MP3 sounded through the Peachtree. It turns out that the dedicated Peachtree USB input for Apple has some magic to make iTunes sound better than expected. Not great but rather good for MP3.
I have FM radio, iTunes, and once my Ethernet-to-USB device is fixed, FLAC via my music server playing through the excellent Peachtree 150.