the new generation iPods? I ask because Apple has apparently made fairly major changes to the circuit (Red Wine will no longer mod them, in fact), including the substitution of a Cirrus Logic DAC for the Wolfson that had been in place before. I'd love to see what measurements JA would discover.
I got one of the 80G Classics (in Silver) for the holidays, and there's no question that it sounds quite different from my earlier (3G) iPod. Contrary to most posters on head-fi.org, I don't notice any difference in soundstaging, but the bass is much tighter (more "solid-state") and the treble is goosed just a bit (I don't think the "flat" setting is truly flat anymore-- I'd guess it's up about 2db at about 12-13k-- like turning the "presence" knob on a guitar amp.). I haven't done enough listening (with or without headphone amp) to have made up my mind, but I'd guess that a) there's a slightly better THD, b) the output voltage at the headphone jack is down a tad (you have to turn up louder for the same volume between versions) and c) as I said before, the EQ curve of the device isn't flat.
Any other users have opinions?