Best bluetooth speaker system?

[technic123]

i am looking for a portable bluetooth speaker for use at a dance/fitness class

it doesnt need to be really loud however a bit of volume is needed

the class size is roughly 25 people singing and dancing in a medium sized hall

i have shortlisted a few however would like opinions

Behringer MPA40BT

Samson Expedition Express

thanks for your help

 

[nopiano]

There was a review in the June edition of the mag, and there is a summary of all prices here:-

http://www.whathifi.com/news/best-bluetooth-speakers-to-buy-in-2013

I regret I'm not familiar with the two you list.