Originally Posted by Syndrome
Pretty much all modern DAP's are of nearly the same quality. Most of what is going to make one unit sound better than another is the EQ software it has.
Cowon, is renowned for having great EQ software. Sony has pretty a pretty good EQ as well. I don't know much about Samsungs or the EQ on your DAP. If it is capable of being RockBoxed
then you should definitely do that. Rockbox has GREAT EQ software and is available on many different portable units.
I agree, just wanted to add that what makes a big difference in sq as you know are the IEMs/headphones used ...