I don't know why so many people suggest the DT770 isn't portable, I used in as my main portable and it worked fantastic, They are light, durable and very comfortable. The have the detail to pick out guitars well and are just fantastic all around. The momentum are good headphones too i really enjoyed them but the beyers do best them imo. The v moda m100 shouldn't even be in the discussion they are terrible at the 300 price point even laughable. The have big bass and rubbish detail, They are portable with a nice build and look but that's it you are paying for the craftsmanship. For sound the m100 are in maybe in the 100 price point they get bested by the shure440 in that price range which are $70 which is no shame but being $300 is just wrong.
The k550 would be my other choice they are great headphones perfct for detail.