What's the best and/or favorite piece of equipment you've owned? And do you still own it?

The oldest unit I have is Sony CD707ESD
purchased 1990 still use with Schiit Bifrost 2 DAC.
The second oldest is Mondial Designs
Aragon 8008BB amplifier purchased in 1996 still in use with some tweaks love it.

For me it would have to be my Kef 104.2s and my Ayre CX-7e red book CD player.  After almost 20 years, I'm gonna send it back to Ayre for a 'tune up and lube", that's how much I enjoy the sound form this piece. 

My Canton CT-1000 speakers purchased in 1982-ish. Still have them dedicated to my 1995 tubers Audio Research VT-60, LS-8 and Cal Audio Sigma II DAC

There’s been tons and tons of fine equipment in my house over the years.

The one that was the best, had a great sound stage, great rear facing baffles that just pounded out the bass, and was quick. The 1992 Ducati 888sps. Simply the sound from those desmo valves, yes all four of was wonderful. People could hear the sound from miles around. Dancing and shaking to that tight, responsive Italian bass.

There will never be one like her. They stopped making her 1994, next came the 916 and no one was the same.

Drag a knee an elbow too!