Just as the title says, I own a pair of HD555s (Foam-modded) and a pair of 280 Pros. I'm thinking of selling both and getting the DT770s instead. It's not set in stone, but I want something in that price range (200-250). I listen mainly to rock, jazz, blues, and some electronic music, and I'm currently running my laptop or my Fuze (all FLAC or V0) through my home-made CMOY to the cans. Comfort is top priority, even above sound if two pairs are tied in other aspects. I like the sound of the 555s, but that could just be because I'm used to them. Aside from music listening I also will be using these cans for gaming and movie/show watching so I want them to be good all-round. These will also be my only cans so I don't want to be only able to use them at home, thus my closed-back requirement. I'm not too concerned with portability because I'm fine with buying a nice case. Summary: -$200-$250 -Rock, jazz, blues, movies, games -Comfort is key -High-quality sources through amp -Closed-back a must -Portability is nice but not necessary Thank you!