I'm considering to get a secondary headphone to use in combination with my Fidelio X2. Don't get me wrong, I really love those cans; amazing bass, ridiculous sound stage. Perfect for gaming and movies. But it's lacking for music. The clarity is out the window and you get fatiguing very quickly. Since a headphone that does everything the X2 does while also being clearer would cost me a fortune, I was instead interested in simply getting a second headphone to use depending on the situation. Despite having listened to neither yet, I feel like the HiFiMAN HE-400i or the Sennheiser HD 650 could be great, and they're both in my digestible price range of <300€. What do you guys think?