I purchased these secondhand for $80 so they were already broken in and the sweetest deal ever, I always wanted to try them out because I read that they were more detailed than the HD650.  Audio Quality:  The AKG K701 has the most detailed highs I have ever heard, I am a fan of treble and prefer crisp detailed highs with a bit of sparkle.  They sound very similar to the Ultimate Ears Triple Fi.10's, especially in it's clarity and seperation.  Of course the K701's have a much bigger headstage and soundstage and also not as sparkly as the TF10's. ...