The 719 is a nice amp for sure, but there are certain things that require work to ensure continued reliability into the future (removal of corrosive glue and replacement of 'black flag' capacitors at an absolute minimum.
I'm currently running a fully restored late 80's Sansui AU-X701 as my main amp, and compared to the earlier Sansuis the sound is cleaner and less coloured, with plenty of drive. Very nice sounding amps indeed! These are the 'international' version of the Japanese-market AU Alpha series amps with the X-balanced circuit topography.
••• Logitech Squeezebox Touch > audio-gd NFB3(2014) w/ E9018 > fully recapped/restored Sansui AU-X701 and AU-719 > a healthy sprinkling of expectation bias > PMC GB1i speakers > Aurealis and Audio Principe cables •••