Xperia-S v WM-Z
the Xperia-S sounds like a poor-man's X-Series (reminded me of the Amperior's with the WM-Z, soundwise)... it has a nice rich sound to it but lacks any real punch, the Hugh's are lacking, the mids are nice and the bass lacks any real oomph... in truth there is a wide gulf between the two... as a back-up player or someone who wants some music-to-go the player is more than adequate but if you love music, splash out and get both... you're reward will be the smile on your face listening to your WM-Z.
loved this phone, the design is simple but gorgeous very similar to the WM-F but classier (if that's possible), think it's the strip light at the bottom when in 'use' that does it... expect to see a Windows-8 version.
Albums used
Slightly Stoopid - Top of the World
Bob Dylan - Modern Times
The Lumineers - self-titled.
WM-Z stock-buds were used... I can do a comparison with the Heir's when I get them back on Friday if you want.