ATH-M50 vs Ultrasone hifi 580

Have been doing lots of research and its down to these two fine headphones. Which one will be better for lots of hip hop, rap, dubstep well pretty much everything I do like some extra bass but not where it takes away from the rest of the headphones. So which one will be better, if you could give me some pros and cons of both that would be helpful. If your really awesome a video. I will be using them for music listening 95% of the time and the other 5% like videos and things. Thank you please help me!!