Sonos may not inspire the sort of high-end audio lust that a company like Polk can, but it doesn't draw the ire of serious audiophiles the way Bose does either. It straddles a fine line between respectability and gimmicky, and rightfully so -- Sonos isn't really an audio company in the purest sense of the term. Rather than loading up its components with vacuum tubes and gold-plated connectors, units like the recently launched Play:3 make their mark by incorporating wireless streaming -- a feature that's actually painless to setu