high sound quality of an audio product unless you move up, or right after you switch from a lower-tier to a higher-tier product, it's the same reason why Beats are so successful. Plus who are you to make sweeping generalisations about people on this site? Perhaps they have had other audio equipment, I've got perfect pitch myself from 8 years of piano. What audio gear have you had apart from CX300s, CX150s, and a M4? IEMs can never produce the same audio quality as proper headphones due to the size limitation, definitely not within the same price range at least. Also in response to the "sweeping generalisations", it can be made due to the "deals" being posted, the only decent one would have been the Adidas Sennheiser HD25s (personally have not heard from a HD25 before but if you want to take HeadFi's recommendations without any doubt, then it's in top 10 or so). For those interested, from the MP4 Nation's comments on facebook, there seems to be a 30 day refund policy if you're not happy with them (the M4s, or this deal's M5s). Downside is you most likely will have to pay shipping to mail these back to Hongkong. Yeah I like this product and I will endorse it if I choose to, people can listen or they can ignore me at their prerogative. Perfect pitch by the way....lol You haven't answered my question. What other audio gear have you got? Also, since one of the Head-fi.org people