hey guys, Looking for a new pair of headphones for ~$100. I listen to mostly electronic, hiphop, & rock music. I am not sure if I should go with the HD555 or ATH-M50. I never owned a pair of open back headphones and was wondering if it still achieves a good amount of bass that I am used...

Last month my Sony MDR-V700 died. They served me pretty well over the 5-6 years I owned them. I am looking for a new pair of headphones. My main use for them would be listening to music through my macbook or ipod. I listen to metal, pop, techno..etc. Sometimes I will hook them up to this...