Ultimate Ears - Roll

Anything by Ultimate Ears. I have the Megaboom and a discontinued model called the Roll, both excellent. If size isn't a concern (if you won't be traveling with it much, etc) I strongly suggest getting one size bigger than you think you'll need. Trust me on this! It's always better to have more power than you need for audio. It's not just about volume, it's about the quality of sound at lower volume, too. Bigger is better. And they sell refurbished units on their website which is great, that's what I did. Same warranty and everything so why not?

The UE Roll was great

The best I’ve had is the Sony SRS-X5. But I should also admit I haven’t needed to shop for Bluetooth speakers since I’ve bought it 8+ years ago, so I have no idea really. I do have a UE Roll and a JBL Go and Go 2, but they aren’t comparable. They are in a different class altogether.

For the small portable my affections are always with Bose. Some of my favorite speakers for sound stage, portability, and loud reaching well made BT speakers in super portable, easy to handle packages. I have three of their BT speakers and they really perform. As I get less portable, I stumbled into one not on your list — Logitech’s Ultimate Ears brand — which has some smaller BT speakers as well. They’re really well made and they double down on putting resources into the simple features I care about most (sync, app, weatherproofing etc).