Hello, guys. I am new here :) Last three years i use audio-technica m40x with fiio k5 pro. I like this headphones but i want something better and with open backs. Right now i choose between three models: beyerdynamics dt990 or dt 900 pro x and sennheizer hd6xx. I have budget 200-300$.

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I read a lot about dt990. Seems some people love this cans and some ppl - hate. I definitely like theу old-school design. DT 900 Pro x - new model, but how much it better then DT990? Its worth pay more then $100 for 900 pro x ?

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HD6xx - its looks like this cans have rly neutral sound. A lot ppl prise them but some dont like it - they call them boring. And i see a lot ppl say HD6XX bad for games. It is true?

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Right now i use headphones mostly for music, but sometimes play some games, so if HD6xx rly bad for games - i can keep use my M40X (i like them in games).

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What you pick if you must choose between this models ? And sry for my english, not my native language.