Regardless of preference, it's difficult not to recommend the VSonic GR07. It performs remarkably well on all fronts, suffering only from a slightly hard and metallic treble, and a bit of sibilance on some tracks.
Bass is among the best you'll hear from a universal IEM, with great depth, texture, and speed more akin to BA sets. Slightly above neutral in quantity.
Midrange is close to neutral, slightly on the thicker side. Would probably sound a bit dark if not for elevation in the lower treble.
Treble is the weak point, but is still quite good. Extends up high and is actually more refined as the frequency climbs. Slightly metallic in character, but still very clean and well-controlled.
Presentation is solid. Separation and layering is top-notch at the price. Soundstage is open with above-average width, though is wider than it is deep. Depth and layering improve when amped, but are noticeable otherwise.
THD is among the lowest of all IEMs, so the sound is clean and free of grain and rather transparent for a universal IEM; you'll never forget that you're listening to headphones, but they can sound quite life-like.
Build and fit are both excellent, and cable noise is nonexistent.