I've really had my eye on the 1Z for a long time, but could never justify its price over the 1A or even ZX300. Some people claim that they cannot hear any appreciable differences from the ZX300 to the 1A or 1Z, which perhaps speaks to the point of diminishing returns. Where I live here, it's difficult to find something like the 1Z to audition. However, I have the decade-old Sony X1060 which I still love the sound signature of. Very intimate and organic sounding without any fatigue after long listening sessions. I could imagine that the 1Z is likely a far more articulate iteration of the same, with the same romantic and liquid sound signature. Knowing Sony, the price for the 1Z / 1A will plummet when they release the next best thing in a year. My other thought is that most high end IEMs have a reference/neutral sound signature, with varying degress of musicality, which perhaps is why they match up better to the "warmer" sounding 1Z based on what I read. Still, does that mean that the 1A will be a poor match for my current AKG K3003? I plan to use IEMs only for the portable setup. Also, I listened to the IFI micro iDSD black label, and enjoyed the sound signature, but found zero practical use cases for the DAP/Source + DAC/AMP stack system for portable use. Will the 1A or 1Z sound better and retain a similar sound signature? I, too, would prefer the 1A if it offers me a warm enough sound signature to pair with my IEMs. Regarding a desktop setup - I was able to audition the Focal Clear this past week. They are neutral, with a slight bit of musicality added, and no doubt very articulate and technically great headphones. However, they annoy me at the same time because they are neither here nor there with their sound signature. No arguments about their detail retrieval or balanced sound though. The thing is, I have too many separate headphones and amp/dac setups in my collection that it might be best to consolidate them into one or two headphone systems that are far better. Stax might be the next logical step. I need to find a place to audition them first though.