There you go. You can't read sound you have to hear it.
I agree with an good portable amp, rockboxed classic 7G and a pair of good phones you probably have everything you need for portable music. The battery for the classic does not last as long as the J3's, but it's still decent for daily use. The classic's UI is unbeatable combined with the rockbox, not mentioning the 160GB's. Personally I never liked the J3 sounding when I owned it for a few months.
iPod 5g/5.5g are excellent alternatives to the classic if you like the wolfson dac. Also the 5g/5.5g can be modded in many ways for sound quality, improvement in battery and SSD's.