What has been your most satisfying component?


I don't think I have seen this question asked so here it goes. Many of us tend to buy and sell looking for the ideal, the holy grail, what works best in the current system, or whatever.
What component (or components)have stood the test of time in your system? I've been through quite a few but some have stayed despite having bought their replacements and subsequently selling them. I'll share once we get a few posts to get things going.
nutella
Quicksilver 300B SET amplifiers have remained in my system longer than any other component has before. I once came close to selling out of financial necessity, but they've managed to stand the test of time and temptation to try alternatives. Other components have changed around them, and in my other system, but they've remained and have never ceased to delight me.

Marco
VAC Renaissance amplifiers. The sweetest gear I've ever owned. I am on my third version. I started with a 30/30 MKll. Then I bought a 70/70 MKlll. I thought that was it for me. All of a sudden a 70/70 signature came up for sale here. Just when I thought it couldn't get better, every step was a quantum leap. Kevin Hayes of Valve Amplification Company is a genius. I don't work for VAC, and I am not related to anyone that is employed by VAC.
good thread. since 1984 i've had 3 pairs of b&w 802's (most recently matrix s3's), so there must be something there i find appealing....the mainstay has been the mac c22 II. my second favorite pre of all time(next to the marantz 7), and its not going anywhere.