If life were a beach, Bluetooth speakers would be shells washing up on its shoreline. But which ones should you be holding up to your ear to hear the musical ocean? Which would make your world a more beautiful place? That's why TechRadar is here. And that's why we love music and being able to enjoy it, whatever our budget. Whether you're here to spend just a few dollars or pounds, or have a little more to invest, I've got three ideal musical companions for you. Sound-per-pound audio quality is of paramount importance. Next is portability, durability and any notable...