Hi, this is my first thread here. I have the Beyerdynamic DT880 and I love how clear and detailed they are. I have always wanted to get the Sennheiser HD800 and then do the SDR mod or at least EQ them, due to how much they are hyped everywhere as the most detailed and realistic headphones out there with amazing soundstage. Will going from DT880 to HD800 be a huge upgrade or are they not worth it? Also I will be using them with a JDS Atom amp and my PC's motherboard which is very good for audio I never hear any noise or distortion, but I might buy a DAC as well in the future if it is a big upgrade. Thanks.