Your Forever Pieces? What and Why?

I'm a headphone guy - love my:Sennheiser HE 60 (Baby Orpheus) with my KGSS AmpAKG K 1000 headphones with my Krell AmpSennheiser HD 800  and  Stax SR 007 mk1

Now don't laugh...my Pioneer SX-1250.  Once you replace all the old electrolytic caps (especially the harsh sounding tantalum ones) it becomes a different beast!

I also still have a pair of LS3/5A clones I built 40 years ago that still sound fantastic!

McIntosh MC275.  (Although I've learned in life to "Never say never!"

I have a MFA Magus B bought in 94. Have upgraded it twice. I use it only for the phonostage now. 
Shout out to Sota turntables. Had a Satelite from 91 to 2005 and traded it for a Nova. Never will let it go. 
Also, have a Koetsu Rosewood from 86. 

My Sota Sappire, purchased used in 1987.   It's still amazing!
And my beloved B&W 801-series2's.  
I've tried many times to replace them, and i keep coming back to them. I've upgraded all of the crossover capacitors over the years, and re-oriented the inductors to reduce crosstalk.  My next upgrade is to consolidate the bi-wire terminals with one set of better binding posts.  I have tried many times to bi-wire them, and they always sound phasey and weird when i do.  So I'm converting them to just one good connection!