I have definitely entered the phase where I'm enjoying the music, and specifically new music and genres, more than ever before. I rarely listen to the music of my youth, but still enjoy it when I hear it.
Short story...my high efficiency system is JBL C37 or Altec 604-8G (they take turns). Have been driving them with anything from a homebrew SE45 amp to Dennis Had's KT88 Inspire to vintage Williamson designs. Went to a ham radio swap meet last month and picked up a little Chinese made amp that uses a 6N2 driver and a pair of 832a wired single ended. The 832a were done, so I ordered a pair. I am shocked at how good this little amp sounds. A bit short of the refinement I hear with the other SE amps in the stable, but it cost less than a half Franklin including the new tubes. Since it has a headphone jack, I now feel like I need to buy some decent cans.....
Maybe it is just about the music.....