Tier 1
1. *Sony IER-Z1R. Not much needs to be said here, I think.
Tier 2A
1. Sony XBA-Z5. Incredible soundstage and cinematic presentation, edged out only by the IER-Z1R on this list. Azla Sedna/Symbio Peel/SpinFit greatly increase treble presence and extension. "Balanced with bass boost."
2. TRI i3. Excellent soundstage, wonderfully open and revealing mids. Refined, yet dynamic, engaging, and vivid presentation.
Tier 2B
1. Fearless S8F. Strong technicalities, but I found the all-BA configuration relatively unengaging. Less bassy than I was led to believe.
2. Sony EX1000. Wonderful soundstage and lovely organic timbre. Relative lack of bass made this a no-go for me.
3. iBasso IT04. Strong technicalities, let down by a relatively lean midrange and overly-pronounced treble.
Tier 3A
1. LZ A5. Superb clarity, but too heavily V-shaped, despite my usual predilections.
2. *Campfire Andromeda. "They're OK."
3. Periodic Be modded. Up there with the EX1000 in terms of timbre: rich, organic, vibrant. Tricky to get fit right: poor fit results in a harsh, congested sound.
4. iBasso IT03. Very technically competent as far as mid-fi goes. Engaging U-shaped response. Bass extension, speed, and definition deserve special mention.
5. AK T8iE MKII. Somewhat unmemorable; distinct treble roll-off.
6. Sony XBA-N3. Fun as heck. Amongst my favourite U-/V-shaped tunings. As with the XBA-Z5, Azla Sedna/Symbio Peel/SpinFit tips go a long way to bringing out its treble.
Tier 3B
1. LZ A4. Wonderful tonality, but surpassed by newer offerings in terms of technicalities.
2. FLC 8N. Very good clarity, marred by metallic treble and relatively small images.
3. Oriolus Forsteni. -
Tier 4
1. iBasso IT01. -
2. BLON BL-03. Again, not much needs to be said here. Tremendously enjoyable and good technicalities for the price.
Tier 5
1. *Final E5000. I auditioned these twice from a Chord Mojo. Even with a silver cable and wide bore tips, I found the bass far too exaggerated, and the treble roll-off was too much for me. Below average clarity for its price range.
With the exception of the Final E5000, Campfire Andromeda, and Sony IER-Z1R which are marked with an asterisk, I've owned everything else on the list. I've marked the IEMs with my favourite tunings in bold, for perspective.