I am an audiophile newbie in terms of the equipment. I have been a music collector and builder of a large collection for over 14 years now. I have burned my entire collection onto my laptop. I have recently started to consider upgrading my receiver, speakers, and headphones. I had heard about the reputation of the Sennheiser and decided to purchase an entry level HD 439 headphones from bestbuy. They were less than $70 so I thought why not? I had previously invested in cheap headphones and speakers and have now realized that I need to enjoy my music on a whole new level. I am here to say that after having the Sennheiser 439s for about 2 months now that I really appreciate the sound that they have. I have heard things before in some of my songs in my collection that I have not noticed before! I also think that the bass level of the 439s has improved since I first bought them. I like the broad soundstage they bring to the table and also the detail of the bass. It is not punchy bass, but it is a very rangy bass. I have begun to become a headphones fan. I had previously listened to my music over my Sony Surround System. This if my first serious go round with a set of cans and I can say without a doubt that I appreciate the detail and distinctness with which I can hone in on a particular instrument or sound in a song. I don't think that is possible with an external speaker. I do realize the benefit of speakers but I have a whole new appreciation for Sennheiser and the 439. I realize the HD 650 is the flagship and I strive to that in my future. Sennheiser thank you for opening up a whole new way of listening to music for me.