Bought this as a factory second for £100 recent for a bit of portable fun. I have been looking at the Amperior for quite a while but I ended up with the DT-770 32ohm, which I did not regret at all. The initial pricing of the Amperior was the major thing that stopped me from buying it. But now that it has been discontinued by Sennheiser, the price has dropped quite dramatically as they are introducing the aluminium version of the original HD-25, essentially the Amperior with 70ohm drivers. Anyway, I am happy with the purchase.   I guess for the...