Which components are "stupid good"?

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

Tube Research Dude (also the Samson amps). Tube Audio Labs TADAC (DAC). Eagle amplifiers.

I have to include the Vh Audio V/Caps into this group..Though maybe not considered a component,they sure qualify for the " Stupid Good " category...Both the CuTf and the TfTf,are exceptional..It just becomes a matter of
which version Cap best fits your needs.
I tried both versions and ended up with the CuTf caps..Not cheap,but considering the upgrade in performance,they are well worth the price.....