We thought Blue Aura's v30 desktop audio system was pretty cool when we reviewed it a couple of months ago, but a system based around a tube amp's unlikely to have much mass appeal. The $449 x10 Bluetooth speaker might. It includes apt-X for better sound from Bluetooth, plus NFC for one-touch Bluetooth mating. The enclosure houses two 4.5-inch woofs and two 2-inch mid/tweeters. A switch in the back lets you use two x10s to create a stereo system. There's also the new x30, a Bluetooth version of the v30, for $399.