To be fair, the reason that GD hasn't been overflowing with DP topics is because they're being posted in the DP section. ^_^;
But to address the headphones question, I've just been plugging in my iPod headphones. To be honest, they don't seem to improve the sound quality... they just make it so that you're the only one listening to the game. So even if you got special headphones just for the DS, I doubt that'd improve Chatot's cry much, if at all.