Everything revolves on personal preference. I personally loved a Trainwreck head I owned years ago through old pre Rola Celestions. I would move those speakers out of the original Marshall cab I bought in 1967 to some Hiwatt cabs I bought in early 1973. The best I can describe what I liked about those speakers was their violin/viola sort of woody sound.
I sold a good deal of my vintage stuff over the years. Once the fellow get backs from his travels, some profiling will be done using those speakers. They are smooth on the top end and mic fairly easily in my experience.
+1 My Trainwreck LOVES pre-Rola Celestions. But, to Andy's point about shrill, it also LOVES old Mullards. They're what Ken built the amps around, and they are a critical part of the tone..