Your Forever Pieces? What and Why?

Judging on how long I've owned them:  My Conrad Johnson Premier 12 tube monoblock amps.
I bought them in the late 90's as I remember and they've been my main amplifiers since.  Such a hard to find combo of tube lushness yet focused, punchy and well controlled from top to bottom on whatever speakers I put on them.

I'd also add:  My Thiel 02 and Spendor S3/5 speakers.  I've had the Thiels (fairly cheap monitors put out when Thiel wasn't yet doing time/phase coherent designs), since '92, and the Spendors since around 2001.  The 02 was my entry in to good sounding speakers and they remain for me a sort of benchmark, the way they combine organic tone, with a chameloen-like ability to do any instrumental timbre, and an aliveness and palpability that brings everything alive.  I still put them in to my system now and again, as I have for the past few weeks, and it still seems like they have things to teach me.

Same for the little Spendors.