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.
What's the best and/or favorite piece of equipment you've owned? And do you still own it?
My favorite piece(s) are (and I still own them) the Martin Logan Ethos lousdpeakers and Soudsmith Paua cartridge. As far as speakers go, electrostats are my favorite and will replace them with another set of electrostats. I'm currently eyeing MUR Audio SP1's. These two pieces make my rig sound great.