Hi all, I should buy a pair of in-ear headphones, High-end (120 to 200 €) for my good old creative zen x-fi 16GB. Whereas I usually listento classical music, jazz, old rock and healthy, in essence, I need some earphones quite linear,and not the usual unbalanced bass! 
 
the choice is between these: 
 
Sony MDR EX600  
Sony MDR EX-700 
HiFiMan RE-262 
Shure SE315 
 
 
What I need is a justified comparison between the selected models. 
 
Thanks to all