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
Antique Sound Labs Wave 8, the only item (I own) going for more than when they were new. 
My 15 year old UK made Castle Richmond 3i small standmounts. Recently dug 'em out for a change from my Quad S2s and they ain't going back anytime soon.  
My Musical Fidelity M6PRX amplifier. Since I got this amp I have tried others including Bryston, Mark Levinson and Coda. I always come back to it. It seems to have great synergy with any speaker I try and it just sounds great.
My Mark Levinson 380s Preamp.  It's out for refurbishment now and I hope to get another 20 years of beautiful music when it is done.  Tried others in the past but none could match the neutrality.