Shure SRH840 (SRH 440 was also pretty nice,when I listened to it from portable device)
AKG K550 if you achieve good seal
KRK KNS 6400 (I didn't like sound signature of 8400)
Sennheiser hd 25 1 i-ii
Sennheiser hd 5*5,5*8 series (only tried the 5*5 series though,but i see good comments about the 8 series too)
Focal Spirit One
Koss KSC 75 ,Koss Portapro
Sony MDR 1R but I listen to them at lower volumes mostly,due to their slightly midrange-colored signature,which I don't like so much at normal to higher volumes
Some others that I haven't tried but I would like to, for portable,non amped use,are CAL! ,Fischer Audio FA 003 etc, V MODA M80, Sennheiser momentum,audio technica ATH M50,Beyerdynamic dt235,Beyerdynamic DT 1350,sennheiser hd 219/229,sony zx700,some philips cans...