I think the most important aspect in buying headphones is comfort. I've tried the AKG's and the Grado's with the "bowl style" earcups and they drove me nuts. They pushed on something just a little forward and below my ear and I couldn't stand it in about 20 seconds. I had bought a pair of Grado SR200's used with the "flat" earpads. They were somewhat comfortable for about 30 minutes. My dog got hold of them and ripped one earpad so I had to replace them with Radio Shack replacement pads. I can't believe the dog is still around. I can now wear the 'phones for an hour easily. So I suggest making sure you try them on before you buy if possible. I've read that the Sennheisers(580,600, and 650's) are smooth but not as detailed as the Grado's. I didn't get to listen to the AKG's. Good luck.
