Budget streaming amp


This subject has probably been beaten to death... I will keep this very simple - I have a pair of passive bookshelf speakers and a room. What do you like/hate/love about of these 5 options? What other options should be considered?


Sonos Connect Amp $200 (eBay used) 

Yamaha R-N303 $300

Sonos Amp $649

Bluesound Powernode 2i $900

NAD C368 w/blueos $1400


I feel like $200 Sonos is the easy answer.


brinkmm
Have you looked at any of the Raspberry Pi options? They have a variety of RPI based amps that could convert any speakers inexpensively. 
I had the NAD with BluOS. I didn't care for it at all. It was very sensitive to phone location plus it just didn't sound good with Bluetooth. I went with the Marantz ND8006 CD/network streamer (via WiFi) for $1200. Sounds wonderful!