I have tried several headphones in that range (HD599, HD58x, HD6xx, HD560s, SHP9500/9600, Fidelio X2HR, PC38x, G4ME ONE, AKG K712 Pro) some of them I used exclusively for months like the SHP9600, HD6xx and HD58x.
Somehow I still find the HD599 SE to be the most enjoyable headphones in this category. They’re like the perfect balance of fun, detail, soundstage and clarity. They’re not too fun like the X2HR, not too detailed, but just perfect for me. I compared them against the HD560s and honestly the 560s were almost my least favorite headphones but I’d choose them over SHP9500 and the gaming headsets (PC38x and G4ME ONE). The HD560s had more clarity but the soundstage was noticeably narrower than the HD599 SE and I think they had no slam to them or fun factor. They’re like HD6xx but slightly worse and barely have a wide soundstage but that’s just my casual opinion. I know they’re quite loved headphones. I don’t know how but the HD599’s have magic to them lol or I’m brainwashed at this point.
This is what the 579 is to me they're my love of 6 years now, I'm comparing them to the XS tonight and they're the first thing I've tried that reminds me of them. The XS reveals way more detail and just sounds more massive, I can hear more texture of all the sounds but holy do things like badly recorded metal sound the worst ever. However I put on some Polyphia and suddenly I'm wrapped in a warm delicious eargasm. The 579s don't sound as revealing or rich but they do make lesser recorded things not sound as bad as they are. I'm grabbing any spare 579s I can find left, nothing else strikes the balance of decent soundstage, decent midbass punch, decent ability to hear all ranges without anything muddying up one another they are my ultimate 24 hour no faitgue can