I'm personally happy with Bose Soundlink speakers for Bluetooth. They're not the cheapest, but they have good sound quality. If I were going to go for a wifi s

I'm personally happy with Bose Soundlink speakers for Bluetooth. They're not the cheapest, but they have good sound quality. If I were going to go for a wifi speaker, though, I'd seriously look at Bluesound's product line. They're a Sonos competitor and they're not nearly as well known, but they're part of the same little group that owns NAD Electronics and PSB Speakers and use amplifiers and acoustics from those sister companies. If you're an audio nerd (or even if you're not), that's a pretty good pedigree. AFAIK Bluesound products work with various voice assistants, but don't build them in. (Edited to add: I don't own a Bluesound device, but I do own a NAD T758 receiver, which uses an earlier version of BluOS for its streaming/wifi capabilities and it's pretty solid.)