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.  
polkalover
Lafayette KT-550 tube power amp for one.  It was built in the 50s and still kicks the ass of most any amps I have ever heard even in stock form.  Other than that, the large Ohm Walsh I had in college playing dark side of the moon.  After that it is all the products I build.

Happy Listening.
My Sonus Faber Electa Amator speakers. They are the original ones, bought new in the 1990's, with the marble/walnut stands. If I can pick two, it would be my Stax headphones (currently 009s).
Lot's to choose from but probably my Nakamichi Dragon. I was a cassette deck-aholic! Next would be my 70lb Thorens TD125 Black Forest Edition with SME Series 3 tonearm and Shure cartridge. Currently I love my KEF R series speakers and SVS SB 3000! I'm now an HT junkie...
Oops right in addition to the Ohm Walsh since 1982 there is my Linn Axis since 1986.
My Apogee Duetta Signatures. Purchased in 1991. Still the centerpiece of my system.