Amplifiers:A Keeper for Life. Do you know of one ?

The problem with the question is that I don't know if I have heard an amplifier I would want to keep for life. There are so many great audiophile and professional amps out there and I have not heard near enough yet. I do know one thing, it will a Class A or A/B design. Most every amplifier named in this post is either a Class A or A/B design. I have not owned any of the new Class D to T amps that for me are even in the running so far. I've owned over 40 different amplifiers so far and the only ones I seem to keep are all Class A or A/B designs.

Short list:
Pioneer
Sony
Tandberg
Nakamichi
Yamaha
JBL
Crown
NAD
Acurus
Music Hall
QSC
Carver
Audire
Hafler
BGW
Digital Phase
Audio Zone
Tripath
Bel Canto
Audio Analogue
Audio Flight
Creek
Atoll
Aragon
Quad
Threshold
Spectron
Parasound
AVI
Monarchy
Krell
Bryston
Unison Research
StereoKnight

Marantz MA9S2 monoblocks. Detail, bass control, great mid and HF. What more do I need?

How many of all the previous posters still own that "Keeper for Life"

Of course we'll never know but as Sonicbeauty asks, I too just wonder.

Very hard question...depend of your budget and your personal taste, otherwise we will have only ONE reference...
In my personal experience in a midle-hight range cost of power amp. as Halcro, Gryphon, Vitus, I have no dubt:
B O U L D E R !

With the right speakers, there is no reason to ever replace the Atma-sphere M60s, though I will hold on to my Music Reference RM10 MKIIs for as long as I listen to music. I thought my CAT JL2 was a keeper for life, and if they did not weigh 200lbs, I probably would have kept them, but their weight and heat got me into the Atma-spheres and when an OTL works with a speaker, I've not found anything better.