For reference I also have the Sennheiser HD280's for my office and another pair for my home PC, and the HD600's for my dedicated music/ht setup. The etymotics have the same level of detail of the 600's (more detail than the 280's), but don't have the same level of bass as the 280's or the 600's, but that's to be expected. I just turn the bass boost up a notch on my portable player and it's fine. I also had the Grado SR60's in my posession for a while before I gave them to a friend as a gift a couple of years back, and I also had the Sony MDR-V6's on loan from a friend for a couple of weeks not too long ago. For their size and the sound quality the Ety's rule. The other headphones I've tried (that are small like the Ety's) all suck at sound quality, while the other headphones that match the Ety's in sound quality are all big, bulky, and not portable at all . . .