Nice review. One of my Top headphones. The Velour Pads are a must IMO. Also I did a mod here : http://www.head-fi.org/t/635480/simple-but-successful-mod-on-he-400s
It really helped with the weight and comfort and makes this headphone wearable for much longer.
Nice! Definitely going to do that once I get mine. The stock band looks very inadequate. Shame HifiMAN don't do something similar.