I Tried the SJ-55 for a while,I did a comparison of it to the koss portapro,though the sound of the sj-55 was generally brighter and clearer,i prefered the well-balanced sound of the PortaPro to it though,so I got the portapro instead,as for the rest,i'll give them a try whenever i'm free enough
ps.i'm just a 15 year old student,trying to start a collection of headphones,i've got nine so far,all are under $100 though,I thank all of you for your help