Hi, based on the models mentioned I'm assuming you are looking at Bluetooth speakers. I'm also looking for one but haven't bought one yet. I'm leaning toward the JBL Flip or Charge, reviews at Amazon say they play pretty loud with no distortion, the charge is supposed to have some bass due to a passive radiator, although it's hard for me to get my head around 2 inch speakers doing much but these type all use small drivers and JBL has a good rep, I just plan to buy where I can have a return. The Charge also can charge your phone, hence, the name. Interestingly, Crutchfield has a bit better selection than even Amazon. I've never heard of UE but they have a speaker with a good rating as well. I like the fact these things have rechargeable batteries. I also considered the Klipsch, with a rep for efficiency I'd think they would have some volume. I just want to be able to hear it decently while outside, a portable speaker like that though would come in handy a lot of places.

If you spring before I do let me know which way you went and I will do the same.