Well, I've finally got the FA-003s over to China, and have had a chance to listen to them in depth after about 50 or so hours' burn-in. Systems used were (i) Opera Consonance Ref. 2.3 Mk. III CD player + Opera Consonance Cyber 20 (NOS Philips EL84s, NOS Mullard CV4003), (ii) Lenovo T400 + WAV files + Foobar 2000 + ASIO4ALL + Little Dot DAC_1 + Little Dot Mk. III (NOS Mullard CV4010) and (iii) QLS QA350 + iBasso P4 (various op-amp configurations). Main comparison were my trusty HD600s.
First off - I have to say that the FA-003s are NOT as good as the HD600s. At the price, I wouldn't expect them to be, but they do offer good value for money, and stack up well against other closed cans at or indeed somewhat above their price point - they trounce my Denon AH-D1001s, for instance, and sound remarkably better than any AH-D2000s I have heard (although I have not heard these in my systems, so the comparability here is limited).
What I can say at this stage, is that they sound very clear and detailed, with a "punchy", forceful (but not exaggerated) bass. In terms of detail protrayal and projection, they are sometimes ahead of the HD600s, but are also somewhat more aggressive (this may change with further burn-in and / or cable changes). Where I have to disagree with some reviewers is the issue of sounding "very much like an open can". They don't - they sound like a good, fairly neutral closed can. Lots of detail and dynamics, but not much in the way of a soundstage. To use an analogy, if the HD600s sound like good panel speakers, the FA-003s are more like GOOD horns (that is, direct and detailed, but not coloured).
So far, they do what I want them to, and are a good complement to the Sennheisers (if they sounded the same, there wouldn't be much point in buying them, would there?). I will post further reports as the burn-in and experimentation processes progress. First project will be to solder up some ZY cables similar to the ones I am using on the HD600s. Does anyone know where I can find the correct slim, locking 3.5mm connectors to attach the cables to the cups? Does anyone have experience of the wooden cups from the FA-002Ws? I have heard that they can be fitted to the 003s.
One final word - the Fischers are remarkably easy to drive, making them suitable for (trans)portable systems....