All time classics? Your top 3 or 4?

This is tough.

1) Large Advent (I still have mine in the closet)

2) Dynaco stereo 70 (sold it like an idiot 20 yrs ago)

3) Mcintosh 2205 (didn't buy it like an idiot 20 yrs ago)

Linn LP12 - Most influential TT ever.
Quad ESL 57 - Most influential early ESL.
Denon DL103 MC Cartridge - most influential MC design ever.
Rega RB250 tonearm - 1st real High-end arm at low price.
Berning ZOTL amp-Made SET OTL possible for the 1st time ever
Stax Headphones - Set the world standard for many years.
ReVox B77 - Long time World standard for Open Reel Tape decks.

Honorable mention:
Futterman and Atma-Sphere for pioneering OTL design
Marantz 8B for it's amazing longevity
Koetsu for truly High-end MC cartridges

TWL rocks! My picks:

Magnepan MG-3 (other models too)
Harold Beveridge model 2+2W electrostatic speakers
Andy Rappaport amp one
Conrad Johnson Premier 1 and 3
Joseph Grado cartridges

(1)Linn LP-12
(2)Dalquist DQ-10
(3)Spectral DMC-10
(4)Snell AIII
(5)Koetsu Rosewood
(6)Bedini 25/25 1 MEG

All of the above set the standards for their time or their respective categories(IMHO).

This is a difficult.

Harmon Kardon Citation 16 (my parents had one when I was a kid, It rocked)
Magnapan MG IIa,s (1st high end speaker I owned)
NAD 3020 (one of the best values every in HiFi)
Thorens TD160 W/Grace707 arm (1st turntable I owned)