B&W makes the best speakers in the world why not an iem? The series 2 is out on the c5's and with a bigger driver and more refined sound, the loose base is no longer an issue making these a great pair of iem's! Also the design looks very nice compared to a lot of iems in my opinion. Here is a headfi review http://www.head-fi.org/products/bowers-wilkins-c5-s2-in-ear-headphones-black/reviews/11656 VOTE UP