Yes, gladly and thank you.
For example "No where, now here" by MONO, from 7m30s on ward is where I'm looking for an upgrade over what I'm having or at least close to how my T800 perform. Tons of layering with added noise to create an atmosphere for the track. Except for my T800, all sounds very congested and spilt over.
Or "The Valley" -Leprous, from 4m10s. With T800, I love the authority and heaviness of the guitar & the drums over the singing/chanting of the vocalist.
Or "Slave" - Leprous, from 3m10s, with the HD600, it sounds like an uncontrolled mess, weak and thin.
Or "Com" - MONO, from 8m37s, the T800, although with clearer separation, it sounds quite narrow in my ear compared to HD600, I enjoy listening with the Sens more. And I think it lost the soundscape that the artists intend.
Or "Knights of Doom" - The Sorrow, from 3m55s, with HD600 the guitar is lost and again uncontrolled mess. With T800, the instruments are much clearer and enjoyable.
I'm quite happy with how my T800 handles these track with nice separation, dynamic and clarity. It still has some rooms for improvement that I can see it's lacking but it's the best I have for these kinds of music
I'm not good at describing sound at all though, but I can hear the differences.
I would be happy with the Cascade if it's close to the T800 in this regard, but if it's more like the HD600, I wouldn't want to keep it at all.
If listening to those tracks especially enjoyable with different headphones, please do let me know.