Time for an upgrade, Rolf
You will get to know the joy of breaking in capacitors all over again
The Jensen's are quite a bit better at decoupling and suppressing unwanted transients and other i.e. digital high frequency noises. They clean up the power line going into and from the power supply case. The sound difference is quite easily heard and, I hate to say it, worth it.
It is such a night and day difference, that I am somewhat seriously thinking about stopping production on the Basic to concentrate on the Superior.
Another idea is to use some smaller, but still far too expensive, Jensen caps in the resevoir position after the regulator. This would still add at least $100.00 to the price of the Basic, but it should deliver a similar sound.
I have ordered some of these smaller Jensens to try out in a Basic. It will still be a few weeks before any results will be reached.