Which components are "stupid good"?

Over the years these are the 2 that struck me as silly good

Placette passive preamp - resister based, which is excellent in some set ups.

Canbridge Audio 840C CDP

B&K 200+ amp
Adcom 565 preamp
Sound Dynamics 300ti speakers
C&J sonograph TT and arm
Amber series 70 amp old but still sweet and not sterile like earlier SS amps
JVC 1050&1010 CD players

The very well thought out and beautifully machined titanium counterweight for all the Rega tonearms available from Kerry Audio Design.
Makes Rega RB-300 even "more stupid good."
And that ain't bad!
Also, I second the classic JVC XL-Z1050TN CD player included in the list by Schipo.

I agree with Rega's arm and add most of Oppo's DVD players.

The deHavilland Ultraverve preamplifier...

Wait for it.......Wait for it.....here comes the audiofeel