Thanks a lot mate
The F series are great sounding WALKMAN. I have the F806 which also pairs great with DN-1000. I didn't think I'd be pleased coming from the hisound units, but was highly surprised so I can understand your little Impression. You'd be hearing some very decent sound quality with that combination.
I know right? Today I loaded a couple of albums I hadn't listened for a while and I was surprised to hear details I had never noticed before. Such a great feeling.