If you can forgo Z-Wave smart-home devices, this is the smart speaker to buy (but that calculation could change soon).
Echo review (2019): Low-priced, but not low-end
Echo Plus 2nd Gen (2018) - Hands On Review
Echo Plus (2nd Gen)
Echo Plus with built-in Hub – Silver : Devices
Enbrighten Zigbee Dimmer, Dual Outlet Control Plug-In, Pairs
Echo Plus with built-in Hub 1st Generation– White : Devices & Accessories
A compact, capable version of 's top shelf smart speaker - CNET
Echo Studio Review
Echo Plus 2018 Review (2nd gen) with Pros and Cons - Smartprix
Echo (4th Generation) review
Echo Plus (2nd Gen) review