Finally received my Koss Pro DJ100 yesterday after a month long wait. They sound amazing. I can understand why some people say they lack bass, and I love them for not buying to the "bass equals quality" BS you'll find on mainstream headphones like Beats that enhance bass for the boomboom crowd.
They were more than $80 everywhere I looked but found them backordered for $45 on computervalley.ca. Came up to ~$75 with taxes and shipping. A big step up from the dollarstore headphones ;)