Do you listen to instrumental or vocal jazz? Or bit of both? Might get a GAS3 but not sure if it overlaps with my existing TGXEAR sets
Mine is mostly vocal jazz.
The GAS3 is warm neutral, very balanced with good imaging and technicalities and organic timbre. It may be boring for some genres (eg EDM/hip hop), but I really like it for classical, OST and jazz pieces cause it doesn't overly emphasize any frequency band.
It needs an amp though, 180 ohm impedance.
Have you heard the Sony M7 or M9 per chance? Tonally, the GAS3 is similar.