Andreeww
100+ Head-Fier
You are aware that this is for the most part a just recently released new headphone..... Weren't you ???
Being that it's this new, it's unlikely you'll find Retailers that will be discounting it already. The original NH started appearing discounted when these "Carbon" models started appearing, but at this point a lot of retail stores haven't yet seen the NO & NH Carbon models yet.
As efficient as any of the AQ headphones are , I can't imagine that there would be anything that wouldn't be able to drive them (It will be much easier to find an original model NH at a discounted price )
Thanks. For portable use, I was not asking efficiency. I was wondering if the size seal etc are good fit portable use