Harman Kardon Onyx Studio 4
https://www.amazon.com/gp/aw/d/B074P79X9C/ref=psdcmw_689637011_t2_B07HJCLJJ6?th=1&psc=1
Just tested this against the new $400 Sonos Bluetooth/WiFi speaker about a month ago and for a quarter of the price it still sounds better on the low end and high. And on top of that you can connect another in the future for full stereo.