The second-generation Bose QuietComfort Headphones are good, but don’t stand out

Bose QuietComfort headphones used to be innovative. Bose's noise-canceling research is the reason the technology is where it is today, and its headphones set the standard. They were the ubiquitous traveler's accessory. But over the past few years, it's felt like Bose has rested on that reputation, a…