Please try to understand the quoted post as a whole. Each one of us stands in the same position of hearing headphones with exact equipment, one or more setups, and can't get out of this limit. So, you can find a bit of irony in the bolded statement as well. The PS1000 are not far superior, just a significant bit superior for me. T1 are better than the HD800 in terms of tonal coherence but have less expansive soundstage. The HD800 are a bit faster AFAIR but have weird treble balance, say the middle of highs is sucked out making trebles sound light and dry. Their huge soundstage lacks feeling of perspective which makes them lose in direct comparison to the GS1000. The PS1000 have more impact and texture readability than the T1 while preserving more accurate tonal balance than the HD800 IMHO. The PS1000 have perfect decay for me which is a bit compressed or shorted on the HD800. When you compare volume scalability of the PS1000 and the HD800, the latter behave in a strange way, as if they had a built-in dynamics compressor which makes quiet sounds a bit muted. I heard it with one pair and haven't realised on the other. The T1 become from song to song irritatingly boring. They sound on the PS1000's level only with some genres and mastering formats. I had impression the last time as they were dedicated for listening to hi-res HDCD or SACD samplers or artists kind of Diana Krall. Fun genres fall off, especially hard rock and metal where unrivalled harmonic resolution of the PS1000 is something important to me to enjoy distored guitars sound. Actually, Grado improved on this aspect when you compare the GS1000i's midrange to theirs. It sounded as if some of harmonics were damped or muted and replaced with the sweet wooden echo instead. It is discernible not only on the guitars but also piano and violins. I like vocals on the PS1000 because they don't add their own timbre. For some, this sounds too hollow but for me is just more real. Human voices aren't sweet in general which many "vocal oriented" headphones suggest. That's it, more or less.