Hey David
My ears are about the same age as yours
.
To not go off topic this is what I use regularly on my Cord Mojo and poly when I am traveling.
Context:
I listen 6 hours a day on average and 2 days a week I commute into London on the train.
Pairing
At home I use Oppo PM3's and Sennheiser 660's.
On in London and on the train I use Shure 535 LTD's (standard filters and snugs) and recently BGVP DM6's.
I listen to mostly 192/96/24 bit, and all sorts from classic violin to pop.
Campfire Solaris
I'm only 3 hours in (and burn in is supposed to take 40 hours).
DM6 was an upgrade by maybe 10% on the 535's (I have loved the 535's for years by the way my 3rd pair)
The Solaris is an upgrade of around 50%, I am shocked! It is like a vail has been lifted. I am hearing details I have never heard. Separation and imaging is amazing. I am really loving the base depth it's there when something base is needed it even tickled my through ! But if you play pop which had little base you don’t hear any. I listen to a lot of live well recorded stuff and they seem to be really good at making you feel like you are in the room with them. I didn't know the mojo / poly was so good.
IM me if you want more detail, I am being brief as it is a little off topic. I just wanted to answer your question.
Max