I experienced the most immersion in my music with my first pair of purchased phones, the Koss PortaPro's, with their open sound, and vibrant reproduction of my music, I had never heard anything like it, being used to earbuds. Since then, there has not been quite as big a WOW factor as I upgrade headphones, and have come to expect quality. Friends have experienced the same thing, that there is never such an enveloping and wonderful sound as the first leap into the hifi.