@orthomead Thanks for the tube life at 6 years. I listen a minimum of 2 hours nightly, more than 800 hours annually.
I have 2 EAR 890 amps but they sound great with classical chamber/orchestral, vocal/opera/pop, jazz (traditional to post bop) and 50's to Led Zep rock-so every type. They run rather warm (2=4 degrees room temp rise after an hour). A pair of VAC 200IQ have more power. I have not compared the two sonically and have not read of a direct comparison either.