My buds suffered a setback as well, as one of the wires came loose when I separated the cover from the drivers. But no matter, I think the Amp3 is now coming into its own, with a caveat. For now, I can only get the great SQ it is capable of when using my tape-modded Grados. When I listen using those phones, no other music player I own comes close. Little or no hiss (must be the burn-in), clear, clean mids and highs, bass tight, accurate. All in all, it is now what I expected, but I can't get it to match up with my in-ear phones as well as with the Grados. I need to perhaps purchase the UM56 custom sleeves for the Westones. I know the folks with UE11s say it matches up very well, so maybe my in-ear phones (down to 3 pair, W3s, RE3s and ADDIEMS) are the problem, not sure.
This also may be why I see PK1 owners saying it's a good match, because the Yuin PK sound is similar to the Grado SR80s, I believe. The Ksc75s also match up very well, but not with the same level of detail as the Grados.
It's about at 75-80 hours now and no hiss.
There is an erratic skipping problem at the beginning of some, not all, tracks, but it last 2-3 seconds. Annoying, wonder if a firmware update can resolve it. It also takes like 3-4 minutes to start up, another minor annoyance. But the battery did make it to about 100 hours, and as ulsanman says, it's really a very high-quality shuffle, because the screen is sort of a pain too. But now, I am convinced that, apart from the quirks noted, it is as advertised. Thanks to abellaw and ulsanman for starting this thread.
Of course, that doesn't mean I am not interested in Germania's mods...
Right now, the Amp3 purchase is turning into a good one.
As a postscript, the UPS guy was just here with the Sony X1000 I ordered from Amazon, but I rejected delivery. Yesterday I saw that Sony has every one of its non-Wifi MP3 players on sale, which means they are certainly going to unveil a new lineup very soon (no surprise, I guess. September?). I haven't heard anything myself, but if they release players without the Wifi component (and with the new amp) I would be interested, since I do really like the A818's sound and form factor.