privilege15
Previously known as "stillevil"
If I'm looking for the most authentic reference sound, would you choose K3003 over IE800?
I'm considering Sony XBA Z5 too.
While balanced armature IEM can produce great details, they, forgive me, suck at properly reproducing lower frequencies thus making the music dry, uninteresting and you can only dream about the soundstage. This experience comes from owning $1000+ Custom IEM (CIEM).
If auditioning both K3003 and IE800 prior to purchase is impossible then I would rather bet on something with dynamic drivers in, i.e. IE800.