thanks for your comments. if separation is great, i'll probably go for c3, but at least will go through other people's comments and other reviews on the net before finalizing.
Edited by shn11 - 10/21/12 at 12:54am
I like my D2+. Great battery, pretty powerful, good format support, Rockbox is not finished but quite functional (even leaving crossfade and gapless alone, I feel like Rockbox sounds better with my GMP 8.35 than the original firmware, which for me, in comparison, sounds overly bright and has little instrument separation).
But as far as I know, Cowons are not in the same league as the players you're comparing. They're convenient, they sound better than most of the mass-market DAPs, but that's about that. I'm not sure that upgrading from D2 to some or all of these players would be worth the money (maybe I'd be better off buying an amp instead), but if I was looking for a new player now, I wouldn't be looking at Cowons.
UP: then again, they sound better than iPods, I guess. But why bother when Colorfly C3 is better sounding (presumably) and cheaper :)
Did you use Rockbox with it? I hear a huge difference in sound signature. And yeah, I bought it because of Rockbox support :)