Sennheiser HD 560S — Sennheiser's most neutral open-back under $200, and a genuine giant-killer.
The HD 560S has earned a reputation as the reference point for budget audiophile headphones. Wide soundstage, accurate imaging, and a frequency response that follows the Harman target closely enough to satisfy measurement-heads while still being enjoyable for long listening sessions. If you're stepping up from gaming headsets or consumer cans, this is the move.