Naim Mu-So 2nd Generation is the best technology available in an all in one wireless speaker.
Other choices: Kef LSX $1,250, Kef LS50 Wireless $2,800, Devialet Phantom Gold $3,200
The KEF gives you two stereo speakers so they have a better soundstage, the Naim and the Devialet are the best single box solution.