Thanks for that.
The Sony appeals to me more than the FiiO, mainly because it doesn't have a touchscreen. However, when I start to consider its recording capabilities I'm immediately compelled to consider other options, such as the aforementioned PCM-D100!
The PCM-A10 might be a good allrounder. I suppose that anything with better recording quality will be much heavier and bulkier, but wouldn't be as convenient for carrying around as a player.
I haven't seen them, but I'm wondering if a cheap player such as a SanDisk Clip/Jam might work okay for general listening, and with the savings I could buy a PCM-D100 or Tascam DR-100MkIII etc when I need a recorder.