I've spent about a month trying to find the words to strictly ask what I'm trying to find. I think I have finally found them and I hope someone can relate.
My taste have changed a great deal over the last 40ish years. Four years spent in England had a great deal to do with that.
In the long past, I was more attracted to a "West Coast" sound represented by say, a set of JBL speakers. I now prefer a more accurate "British" sound.
It seems the 400i may be a blend of the two, which is absolutely acceptable to me. If the music can't be a little fun, it won't be very interesting to me. Can I conclude that these cans will keep me entertained with a sound that puts female vocals snuggled up and singing in my ear and no one else?
That's the best way I can describe what I'm after.