Upgraditis?

Yes.  I think upgraditis begets upgraditis.  You get a new component, you're on that endorphin high, and you crave more.  If you can hold on, it will level off, and you can stick with the status quo for a while, but then some trigger will come along, like hearing someone else's system, and you're back on the roller coaster.

How many here have upgraded two or more components in close succession, followed by a relative period of calm?

Elizabeth,

You really can’t go wrong with Beethoven Sonatas and String Quartets.
 You can hear new things in the music  every time you listen.

It was meant to be timeless. That is why it is still played today. 
Too bad current popular music seems to find this irrelevant.
B

elizabeth

Yeah, I'm that way with the Verdi Requiem. There are approximately 40 different performances, with varying orchestras, choruses, soloists, conductors and venues.     Have only spun eight of them on my (relatively) new BCD-3 and am panting to hear and compare the remainder; however, I'm probably on my last CD player - - difficult to top perceived perfection.   BTW: My latest purchase of the late Beethoven Quartets (Lindsay String Quartet) is a problematic keeper.