Gone is the day when headphones could be respectable without some kind of corporate tie-in or Lady Gaga endorsement. Alas, even Harman's revered AKG division has roped in the venerable Quincy Jones for its new (wait for it) Quincy Jones Signature Line. We're talking three models here, ready for launch in October and ranging from the Q 701 "reference class" over-the-ear cans (pictured), the Q 460 lightweight headphones, and Q 350 buds. The Q 701 features ergonomically-shaped cushions of velvet, an "unbeatable"