UPDATE
Started back when I was in Jr. High:
DeWald integrated tube amp, about 30 WPC (fried it) 1960-1978
Nikko integrated ss amp, 40 WPC (sold it) 1978-1980
Hafler DH-200 ss amp, 100 WPC (gave to my younger brother) 1980-2003
Odyssey Stratos ss amp, 150 WPC (sold it) 2003-2005
Krell KAV-400xi integrated amp 200 wpc (I think I'm done) 2005 - present
Started back when I was in Jr. High:
DeWald integrated tube amp, about 30 WPC (fried it) 1960-1978
Nikko integrated ss amp, 40 WPC (sold it) 1978-1980
Hafler DH-200 ss amp, 100 WPC (gave to my younger brother) 1980-2003
Odyssey Stratos ss amp, 150 WPC (sold it) 2003-2005
Krell KAV-400xi integrated amp 200 wpc (I think I'm done) 2005 - present