If the SHP9500 is the gateway, the HD 560S is the upgrade you grow into. Sennheiser tuned it to be neutral and honest, so you hear the recording instead of a flavored version of it. Detail retrieval is excellent, and the soundstage is wide enough that some reviewers rate it above pricier Sennheisers.
It is light, the velour pads are plush, and clamp force is gentle, so it disappears over a workday. At 120 ohms it is happy from a decent dongle or PC jack, though a small amp gives it more authority.
Like most reference open-backs, the bass stays polite. It is accurate rather than punchy, and the tuning can feel slightly clinical until your ears settle in (a touch of EQ wakes it right up). For honest sound that does everything well under $200, it is very hard to beat.