Well I've been comparing the 6 and 7g classics for a few days now, and I'm plesantly surprised that the 7g sounds significantly better. I wish I had a 5.5g here to do a direct comparison so I cant say which one is better. But from memory, I would say the 5.5g is slightly more musically sounding. I would put the 7g ahead of the iphone 4. It sounds a bit more neutral and has a more lively sound. It's definitely a step in the right direction. I thought the 6g was a big step back. I still think the 5.5g is the best sounding iPod ever made, but really can't be sure since I can't do direct comparisons. But the 7g is good enough not make me miss my 5.5g. The thin size, ui, and ability to be used as a digital transport makes it a better bet for me. So it's a keeper.