I love my 530s. I'm probably going to get flamed for this, but as an owner of JH16s as well, I can't honestly say that the JH16s are $700 better than the 530s. Don't get me wrong, I REALLY love the JH 16s and have them in my ears almost constantly. However, I still listen to the 530s out of an ipod on public transport and whatnot and they are outstanding. One of my favorite pairs of headphones.
Law of diminishing returns. Anyone looking at highend customs (or anything) for value is misinformed and misled. The greater your desire and quest for perceived perfection, the most it will cost you.