To start on a generally positive note, MS 150 is a substantially impressive industrial design—a system that looks like a soulmate to Sony’s original PlayStation 3 console. While its curves aren’t nearly as daring as the football-like Zeppelin Air’s, that fact actually works in MS 150’s favor to the extent that it occupies a middle ground, serving as a somewhat fancier alternative to the SoundDock 10’s slate-like…