So many choices - why wouldn't you set up a digital server at home?
Sonos essentially puts a server in every one of its products. The controller app on your phone, tablet or PC is merely a remote control; up to 32 apps can control up to 32 Sonos nodes throughout the house. Sonos uses its own mesh wireless network to support so many nodes without affecting your WiFi; its competitors claim up to 8 nodes, but bog down your WiFi. The Connect has bit-perfect output with the volume set to "fixed", so can be used with an external DAC if desired.
The only thing the Sonos needs to access music files is a shared drive, such as your PCs hard drive or a dumb NAS. It can also read iTunes XML dictionary, so plays well with iTunes. As of 2015, 92% of Sonos users (including me) no longer bother with home music libraries, preferring to use one or more of the 60-odd streaming service providers integrated into all Sonos products. Apple Music, Spotify, Tidal, Deezer, Google Music, Pandora, MixCloud, SoundCloud, Gaaza, you name it, all available, far more than all its competitors combined.
They have stepped up the game considerably in the sound quality of their speakers, using one amplifier per driver, DSP driver correction, an now room correction, which requires an iOS device for room tuning. Their Play:1s, smaller than Minimus 7s, can't be beat in their size/price range.
http://stereos.about.com/od/Wireless/ss/Sonos-Play1-Measurements.htm
The new Play:5s are technologically advanced, and will be competitive with anything in their price range in terms of sound quality and bass extension. Included in the price is an amplifier per driver, DSP correction, room correction, music server, multiroom capability, access to a multitude of sources, and lifetime technical support. Run a diagnostic via their app, and they will tell you exactly what's interfering with the wifi signal, etc, remotely.
Not technologically advanced? I'd say they are a technology leader, and have been for years. They have one of the largest anechoic chambers I've ever seen for hifi development in house; most companies can't afford one, and use government owned chambers. Last I looked, they had over 2,000 employees, over 50% of whom are employed in R&D. I sure wouldn't mind working for them in their Santa Barbara HQ! How many pure audio companies do
$1B in annual revenues, with very little advertising? They've grown mostly due to word of mouth advertising by highly satisfied customers.