If your main source is vinyl try adding an inexpensive (but good) tube phono preamp through the Sansui.
Hagerman has one for $650 and Tubes4HiFi has one (built) for $400.
The Tubes4HiFi PH14 (I read here) is based upon the EAR 834P, which is a good thing if done right.
Have you had the Sansui refurbished and do you use lead shot in the bases of the VR2's?
Wonder how many posting have heard a 9090DB?
DeKay