Yup those are them... Ebay probably has better service, as all Amazon sellers are in Japan. The have 2 color schemes, 1 being Black/Back and the other Black/Silver, I have Black/Silver, and they look nice. They are durable, as I slept with them on, while sleeping on my side, and have dropped them a few times, and they are in better condition (no blemishes at all) than my NEW HD650s (headband paint chipping). They will scale with an amp, but not too well... I had a friend who said that they sounded much better from his laptop than his phone, so a decent portable player is a worthwhile addition (My Clip+ works great with it though, on the thread we even had a HA-S500 + Clip+ party!) They did do amazing with the ZO2.3 portable amp also, as they literally vibrate your ears!
Burn-in is a must for these, as they have carbon nanotube coated drivers (20x stronger than steel) and need to loosen up. The other things are if you get them shipped from China/Japan it will take around ~20 days to get in (Some guy in the U.S. cancelled their order when they were already here, so it took 3 days!) and the other is comfort. They aren't the most comfortable headphones ever, but that can be fixed by switching out the pads (I'm fine with the comfort though, you don't feel it after a while). The pads you can get from
Ebay when you purchase the S500s, as they both get shipped from Japan/China. You can also get HM5 pads that go around your ears from
MP4Nation (The price is by the pad, so get 2). You also need 2 O-rings from
Ebay (Make sure to get the inside diameter of 2-5/8") to go around the first pads so the HM5 pads stay on better (Stock or ATH pads -> O-Ring -> HM5 pads (Yes, pad on pad!)). The different pads tone the sound differently, and there are tons of mods you can do to make them sound even better, but many people leave them stock! The HM5 pads increase soundstage, and make them real comfy, at the cost of looks, and the ATH pads take away some bass and push the mids forward, while the stock pads are a great all-rounder (I use them for vocals AND EDM!).