Two questions: 1) How can I tell the difference between a 1st Gen and 2nd Gen model without the box? I inspected a pair of H7 and couldn't find any model or serial number anywhere on the headphone (Although I didn't check under the ear pads). 2) Where the heck can you get replacement ear pads? The only ones I've seen are black and pink, and retail for $100... That's more than the ear pads for my LCD-2s.. Thanks!