what will be the best old CLASSIC amp to rebuild.

In my search for a HIFI sound i never found a power amp that let me think: this is it!!! Recently i buy a vintage power amp paid for rebuild and i'm NOT happy with is sound,it put deception on my heart same if he has only 70h of burn in... I do'nt ear the amp before to buy.

My humble question to the big Audiogon fan,will be what
is the best classic SS power amp to buy and rebuild under $1200.

I love dance, rock, classical any kind of music. I wish to
found a power amp that after the rebuild i will SAID OF MY
GOD WHAT A WONDERFULL POWER AMP...This is it!!!