I built a sonos "clone" using a raspberry, the HiFiBerry board, shairplay, and an expensive amp/speakers that allowed digital connections (because doing anything with a raspberry and audio is pretty noisy when analog). Overall it cost about as much as a pair of Sonos 5's.
In the end, the thing is now unused, and I went and bought a Sonos5 and couldn't be happier. Tiny things I just never got working in the Linux world are "just works" with Sonos. Sure, it has some annoyances but trivial things like "playback never starts with a loud pop" was almost impossible to get right. Tinkering with audio in Linux is rarely fun. Not to mention that i only built one system so never even had to deal with time syncing multiple systems (Though I'm sure someone has built some sort of linux solution to handle that too by now).
So having done both of these two systems each for several years, I can strongly recommend Sonos.
Sonos 5's (gen2) still sell for $4-500 used where I am. Which is astonishing for a product that is many years old by now and is $6-750 new. I wouldn't exactly say that's landfill. The Ikea bookshelf thing is also great and costs very little. Sound isn't comparable to the Five though. If you see a Sonos speaker for $8 in a thrift store, it's either broken or you should buy it and sell it on ebay.
So having done both of these two systems each for several years, I can strongly recommend Sonos.
Sonos 5's (gen2) still sell for $4-500 used where I am. Which is astonishing for a product that is many years old by now and is $6-750 new. I wouldn't exactly say that's landfill. The Ikea bookshelf thing is also great and costs very little. Sound isn't comparable to the Five though. If you see a Sonos speaker for $8 in a thrift store, it's either broken or you should buy it and sell it on ebay.