I don't really know much or care much about the Neuros, but why does everyone make such a big deal about how slow USB 1 is? I suppose it depends on how one uses the device, but so what if it takes overnight to load up 15 GB? I've got an older 20 GB HD player with USB 1, and guess how many times I've loaded 15 GB of files at once: once. Now I just add one or two CDs worth of music from time to time, and occasionally delete something I don't listen to much. This isn't a flash player where I'm loading my playlist du jour every morning.
Sure, if I had the choice I'd take USB 2 or Firewire, but for me, USB 1 is not some big hardship. I guess if I were regularly making gross changes in the files I have stored on the device, I'd feel differently, but for me its just not a big deal.
Kind of a moot point now, with virtually all current players using either USB2 or Firewire, but let's keep some perspective here. USB1 is not the equivalent of rubbing two sticks together to make a fire to cook your supper.