I can't say if it is wise to plunk down up to $650 for repairs on a Sansui. That said I have seen their separates on Ebay fetch really big bucks. The AU717's Solid State sonics are quite respectable, but don't inspire me, the way my much more expensive tube gear does. The TU 717, on the other hand, holds its own with my other tuners, but I am no tuner expert. It sounds like the OP is not willing to spend a lot of money in his quest for audio, so perhaps a moderate expenditure of a couple of hundred for new caps and such, is indeed the best way to go.