I just received my HD6xx today. Wow! I couldn't be happier! Thank you Massdrop for providing such an amazing value! I also own a HD700, Audeze LCD-2, Hifiman / Massdrop 4xx, and AudioTechnica ATH M50x headphones. Are these the best sounding? Debatable... BUT dollar for dollar, at this price point, this is an amazing set of cans. Between this and my LCD-2 ( which cost a HELLUVA lot more!), I have found my headphone endgame.