Just sold the NC700s which are inferior in bass and comfort and controls to the QC45. QC45 are the premium line and Nc700 are the cheaper headphone really if you check sealed ones on ebay. Nc700 £150 sealed QC45 £220 sealed. Major issues controlling modes and tracks with the Nc700 touch controls but I find buttons possible to realistically use on the QC45. Almost as good as my plantronics backbeat pro2 for electronic music and hip hop. (those were £45 on ebay and pause when you take them off and have aptx and look better which bose don't do weirdly)