I just picked up a JBL Charge 2+
A bit more expensive at $75 off e-bay, but it has Bluetooth, portable, rechargeable, splash proof, & good reported sound. I need something like this for our excursion to Florida this winter.
I was very impressed with the sound from my daughter's Logitech speaker I got for her 2 years ago. These little portables have come a long way.