The ZonePlayer S5 shrinks the Sonos streaming music experience down to a compact single-speaker system with great sound, which you can control from any iPhone or iPod Touch.
It may not be the most compact portable speaker on the block, but the Logitech Pure-Fi Anywhere 2 offers useful extras and great sound for an affordable price.
The Zvox Z-Base 575 sound bar gets loud and delivers deep bass from its unique pedestal design, but it's expensive and has a bare-bones feature package.
