Hello, I am looking to upgrade from my dt 1770 pro and I've settled on deciding between these two headphones. I really like the sound of the dt 1770 which I hear the t1.2 expand upon with a better sound stage so I am leaning towards those at the moment. The T1 2nd gen are also $400 cheaper so that is a consideration to make as well, if the HD800s are really $400 better if they are better at all. I've also owned dt880 600 ohms in the past and loved their sound quality. I listen to all types of music and also play many video games. I would really love a big 3D sound stage, which is one of the reasons I'm upgrading from the dt1770 despite loving the sound! Since I really like my dt1770 I think I would like the T1.2 a lot but I've seen many people say the HD800s is far superior, so this is where my hesitation comes from. Pros and Cons between these two headphones from someone who knows both will be very appreciated! They will be paired with an ODAC Rev B and Beyer A20 amplifier. Thanks for reading my thread and hopefully any help you can provide!