Well done. The price being asked by SONY is a bit high when you look at what the A25 is selling for but then a bargain compared to the (reviews say sluggish) Z2 and certainly more attractive than a used Z1. Like you I pondered for a long time and did daily net searches looking for one at a good price. The problem with that was most owners of the ZX100 are hanging on to them so used ones are as scarce as hen's teeth. That is why I initially opted for a used A&K Jnr but hated it, so quickly sold it, eventually ending up with a new ZX100.
As I posted before, headphone quality is very important with the ZX100 if one is to appreciate just how good it is. Previously happy with the HiFiMan 400S connected to the A series I discovered just how much music I was missing when I finally got around to silver soldering a 3.5mm plug on a quality cable used with the Sennheiser HD800 and using those headphones with the ZX100. It really was as if a curtain had been lifted from in front of the music. It might seem over the top to use HD800s with the ZX100 but I can assure owners it is not. With the HD800S now released (and yes, I have one of them too) used HD800s are around for around the $800 mark now so are more affordable. No doubt there are other top headphones just as suitable and the ZX100 deserves them.
Bottom line is that a ZX100/quality headphone combo can offer far better AQ than most hi-fi systems for much less outlay with the added advantage it is portable!
But I'm talking to the converted here so will shut up.