This is definitely a fun thread. I've owned many pairs off speakers, but the game changer for me was when I spent the ungodly sum of $1,200 per pair for DCM Time Windows in 1980 (the equivalent of $4,500.00 today!) and they opened my ears to spatial, clean and defined sound.
These days I have a few kits in different locations: I love the KEF LS50s in a small space, the Bower & Wilkins 705 Signatures in a medium space and my ultimate babies: The Bowers & Wilkins 702 Signatures for larger spaces--best of I've heard.
I still have the Time Windows--they're in my garage as a reminder of how they started me on the HiFi high-end journey I have enjoyed for nearly 45 years. They're warped, probably not useable, but every time I see them I think of a young man listening to music in a new light and I smile every time.
It looks like everyone on this thread has a similar fee-good story....that's why music is so amazing.