And I've owned a few in my time!The amazing thing about these headphones was the fact that I brought them on recommendation, and without hearing them. Brave or what?I'm happy to report that they far exceed my expectations. From the packaging and accessories provided with the headphones, to the fast delivery by iheadphones, the whole purchase experience has been smooth and rewarding.So how do they sound? in a word Phenomenal. Speed, timing, clarity and best of all the bass depth is like nothing i've heard before. As I lean towards very heavy bass in my music, the Proline 750's more than deliver, but they can cope with more subtle music as and when required.The only thing is that although they can work on my tiny ipod shuffle, I would give the Ultrasone's a good source to give them the best chance of really performing. Either that or maybe a headphone amp would further improve the experience I'm sure. I say that for the simple reason that a headphone amp is next on my shopping list. And all to get the best out of my Ultrasone’s. They deserve the best!I could go on for hours, describing different pieces of music, and how they Ultrasone's have given a new perspective on my listening experience. But for now I’ll say, just go and buy them.