If you’re after the best budget one, I picked up this one for £59 after reading good reviews on Reddit

https://www.myearfun.com/uk/speakers/earfun-uboom-l-portable-waterproof-bluetooth-speakers-black

It might need a firmware update to get the best sound, but imo it sounds as good as my 10 year old Bose, and much better than my ultimate ears wonderboom

Probably not what you’re after, but you did ask for best. You can’t go wrong with Q Acoustics M20.

Pros:

• They sound amazing
• They are a stereo pair
• They support aptX, aptX HD, aptxLL, SBC & AAC
• They have a load of inputs, so not just BT
• They look very pretty

Cons:

• They are fairly pricey
• They are mains powered so not that portable

I bought one of these a couple years ago and it still lasts 12+ hours streaming internet radio from my iPad at work. Sounds great for background music in a shop. I love how sturdy it feels and the handle is great. I call it “Nintendo plastic” cuz it feels indestructible like the OG Nintendo controllers.

Soundcore Anker Motion Boom Outdoor Speaker https://a.co/d/7ptVcCe

Just to clarify… I work 12hr shifts and it still has about 40% battery left at the end of the day.

A Bluetooth receiver and then good normal speakers.

I use Sonos Roam.

I’m still using a Bose soundlink mini 2 and it’s never let me down. Small but sounds pretty good.

Bose and JBL are quit pricy IMO. I got the Anker soundcore 1 for 20€ and was amazed by the battery life and the audio quality

Bluetooth sucks, period.