I bought the Superlux HD-680 Evo because I needed a cheap option to studio monitors while I waited to get enough money to buy myself a new set of monitors. When they arrived, I noticed that they were well made, and that with the removable wire, I was unlikely to need to buy a new pair for a very long time. The sound quality is amazing. It can produce a deep sounding bass, as well as high pitched treble along with a great sounding middle section.They are comfortable enough to wear for several hours before I need a rest, and they are rather noise cancelling, meaning that I can mix my tracks even if other people are talking in the same room. The good sound and comfort also coaxed me into using them for Skype calls, and it's reassuring to know that I can hear every detail without having to turn the volume up to much. In the end, I do not feel the need to buy monitors any more, as these do the job just as well, with the only downside from using monitors being that you get tired slightly faster due to the sound being more direct. All in all, they are amazing for their price, and perform almost as well as headphones that costs ten times as much.