The only thing the HTF600 has on these are sound stage and perhaps the bass end but these have the better quality bass end. These are in a different class altogether in sound quality. These would be a nice upgrade for you for certain. Much higher end resolution on the sounds. Worth the jump in price.
I see, but do these JVC's still have a good soundstage (even though they are smaller than the HTF-600's) or are they intimate, in your head?
And these have better clarity than the Pana's?
I actually just got the Pana's, less than a week, but i'm already researching head fi threads for my next headphone. I was looking at the HD-598, Beyer DT770, ATH-M50 and today I saw this thread. These JVC's are obviously around 4 times cheaper, but sometimes it's more fun to get bang for buck headphones.