They are my worst purchase ever because they just ruined every other set of headphones I have. They sound so good I can no longer listen to my shure SE420's. I almost can't even listen to music when I workout anymore because of how awful the ipod headphones sound. I have a little dot amp on the...

I know I am about to ask a question that has probably been asked a million times, but as a college student I don't have that much time to browse every thread. I currently have a pair of Shure SE420's and love them. I am thinking of buying a headphone amp, maybe the LD MKII. I'm wondering how...