Sell and refurbish?

I currently have a Rotel RX-1050 (100W) receiver, run through a NAD 525BEE Cd player& hooked to a pair of PSB T45's. It sounds excellent and I enjoy it much. Last week I picked up a Sansui 8080 for $20 at a garage sale. After some topical cleaning I hooked it up and wow! For being 30 years old it definitely gives my Rotel a run for its money. The low end certainly delivers more punch although the Rotel has a slight edge in clarity. I am considering selling the Rotel and putting the funds into a complete refurbishment (there's a local shop willing) hoping to make this beast sound even better. Does this sound practical, or would it be more trouble then it's worth. Also, would refurbishing the Sansui really improve the sound dramatically? Thanks