Cnet: The headphone market is bursting at the seams with sheer variety in every size, color, design, and price range. The portable section alone can be overwhelming, to say the least. Do you want in-ear, on-ear, folding, or fitness-friendly? How about extra features such as noise cancellation, inline volume control, or cable extenders? Then, of course, there are the ever-pressing sound quality and value issues.