What has been your most satisfying component?

Tonywinsc,
Couldn't be further from the truth, I do appreciate the tech part and it is easier to enjoy the music when the system is well put together, but it is the music that I am appreciating and not the equipment.We're on the same page.

It has to be my Sunfire True subwoofer. I bought it for HT 10 years ago and everything else has changed at least once or twice but I've never considered swapping it out. Does its job perfectly and is visually unobtrusive.

Laugh all you want, but it's my old Pioneer 1250 receiver.

Actually, I have two "landmark" components:
Philips MFB 544 active loudspeaker, 3 way, 3 inbuilt amplifiers, 10 inch woofer. Tonally correct, dynamic soundprint with ability to convery body and presence to music. No more hassle with matching speakers, amps and cables.
Apogee Rosetta AD/DA with firewire card. It is a wonderful dac able to compete with the best with added functionality to connection to PC, which would more than enough to justify its price alone. But its inbuilt AD converter and firewire card made possible to record onto my computer live classical music concerts broadcasted by local FM station. Direct live transmissions have something special feeling of live music and ability to convey the "being there" feeling.

Audioquest Doubled Bi- Wired Volcano S/C added so much resolution, they not only upped the anti they changed the game.