Hey guys, for a while now I have been using sennheiser hd600s with my hifiman ef2 hybrid amp and I like them a lot for home listening. However when I go somewhere I can't really take my hd600s with me do to their size and their thirst for an amp. So when I go places I use boss-in-ear headphones whcih were nice at first but the more I listen to my sennheisers the more I hate the bose.... Now the time has come for me to buy another pair of headphones, not ones to replace my sennheisers, but headphones to replace my portable earbuds. I don't like the in ear design and I would like to buy some headphones to replace them. I am willing to spend up to around 80 dollars if I need too. I need these headphones to be portable (not big headphones like the hd600s) and they need to run well without an amp (I'm plugging them directly into my iPad) I was looking at the following: -Grado Prestige Series SR-60i Padded Headphones -sennheiser px100s (I heard there were some build qulity issues) -Koss PortaPro headphones -Sennheiser hd202s -Sennheiser hd280s (maybe, only if there freaking amazing ampless headphones) -Audio Technica ATH-M50s (doubt I would go this high, just listing this cause I was looking at it.) I listen to everything from reggae to progressive death metal to techno and trance. I am currently leaning towards the grados. Please recommend me good headphones. I prefer open headphones but it really doesn't matter to me in this case.