What model receiver?
I'm looking to upgrade my hd280 pro headphones, and I have a few questions. I'm looking for the best cans strictly for music (ambient, indy, drone, jazz and a bit of edm) so movies and games aren't really considerations. I don't have a headphone amp, but I do have an old sony reciever from a htib that I'm currently using to drive my speakers. I don't know how useful it could be for headphones that benefit from an amp. My soundcard is an asus xonar d2x, not the stx unfortunately which does have a headphone amp.
I need tthem to be decently comfortable since I listen for pretty long stretches at a time, but on the other hand I've heard that my hd280s were tight, and yet I haven't had any issues with them. I'm willing to consider open cans, but I've never used open ones before, so I'm not sure how much sound leaks out from them since I live in an apartment. My max budget would be about $250-300 if they're really worth it, but right now I'm liking the Fischer FA-003 cans. I want to hear some suggestions before I order them though, as I'm far from an expert on headphones.
Edit: How safe is it to buy used ones? There are some rather cheap denon d2000 on amazon used.