Hello, I'm really looking for an upgrade from VSONIC GR07. If you've followed my eq curves, you'll know what I'm looking for signature wise, but here's the text: - more extension - lower subbass (<30 Hz), a lot more extreme high end (>=15kHz) - quite a bit more ~10kHz - somewhat less midbass (~200Hz) and sibilance (~6kHz; ~13k depending on tips; Comply foam cuts sibilance, but also general high end energy) Nicer soundstaging is a plus. You can assume large budget, but no customs please - it's real hard to get proper impressions done around here. Also, buying customs blind is quite dumb. Comfort should be close, specifically no chubby cases and large nozzles unless it's designed for very shallow fit. I find GR07 fit slightly fiddly though unless I use foam tips. (as opposed to nonfiddly but shallow insertion Brainwavz M2) Up to 3.5mm nozzle is acceptable if the IEM requires deep insertion - larger has issues going past the What I'm looking for compared to some other IEMs I know very well: Etymotic ER4-s end around 18k which is very good, but have large peaks in all the wrong places. (sibilant and upper mids ~2k) Sennheiser IE8 suprisingly is just as extended as Etys, but has midbass overload and still some sibilance. Slightly too little highest end energy. Soundstaging is almost perfect, perhaps a very tiny bit too far. Bass quantity of Sleek SA6 w/ Bass+ is almost the right amount (very slightly too much midbass), but subbass is lacking, extension is missing on both fronts (ports don't affect it), w/ T+ port there's sibilance, while with T= there's missing power ~10 kHz and a cut at 2-4kHz. Sennheiser IE7 have somewhat too much midbass, hot 3kHz, some sibilance, not enough high end extension. Westone 4 are close to perfect signature-wise, but lack subbass and "body". (thin presentation, typical of many BA IEMs) Could end a tiny bit higher as well, 17kHz is so-so. Is there an IEM that would approximate these constraints? I have a few possible candidates (never heard them), but would like to hear recommendations.