And if anyone has any suggestions that can handle the amount of chalk in a gymnastics facility, I would be happy to hear those too. Ours tend to take a beating.
We got one a few years ago and it was awesome. It is portable though so I'm not sure if it's exactly what you're looking for, but it worked perfect for our high school practices. You can find the website here. They kind of focus on using it with the microphone, but it's great with an iPod/MP3 player too.
those small bose's are pretty mean but costly. Cant be mad at the rechargable battery and aux audio output. How is the Beats working? I also recently saw a Sony about the size of the Bose box and played music via bluetooth which is nice if you dont want a mess of cords.