dcfac,
The Sony Walkman A17 was released in October of 2014, as was the Sony Xperia Z3 (actually Z3 was September, but didn't reach the States until late October. I should know, I got it THE DAY it came out from T-Mobile lol). I know for a FACT that the
most recent update from this past Spring for the A17 includes LDAC capability, so that's for sure. I have the Z3, and as of yet, I have not seen anything to indicate that it will get LDAC, but that doesn't mean it won't for sure. I'm not holding my breath though. lol I had the A17 Walkman which was just great, but then I decided that for me, having one device was more practical than 2. I may change my mind again, but prob not for a long time. After much research, I now pair my Z3 with the highly revered
Celsus Sound Companion One amp/DAC, which comes with Wi-Fi (not lower quality Bluetooth) streaming. It cost $595, but it's actually rated as having BETTER sound quality than amp/DACs or amp/DAC players TWICE its price, including the
Oppo HA-1 and the
$1200 Sony Walkman NW-ZX2 (which is now $989).
The ZX1 Walkman was released in December of 2013, so it MIGHT get the LDAC update, but I would say it's less likely since it came out in 2013. If you really want LDAC though, my advice would be to sell your ZX1 and just buy the
$300 Sony Walkman A17. I've actually seen at least
one review (scroll down to bottom chart) that rated it better "where it counts" than the ZX1, though that's just my interpretation. Then you could save some money and also pair the A17 Walkman with the 1ABTs, and let us all know here how it sounds vs other Bluetooth headphones perhaps. (Please read my
last post for an update on the 1ABTs.)