so i bought a UE boom 2 back in september since my ex took the only bluetooth speaker with her. I love it, great sound for the small package, good battery life and even in my 2400 sq ft house, the music could be heard everywhere. Now that i'm in my 1000 sq ft apartment its more than adequate.
However like you i wanted another speaker for a different room, or for a more stereo experience. Well i found out you can link 2 UE booms together!!! so i bought a second one. I love it and am very happy using this as my music playing speakers for my place. you can either set them up to play the same (each speaker playing L/R so great in separate rooms) or set them up in stereo (great for the same room)