I just re-capped my 1960 Sherwood S-2000 tube tuner, and I replaced all the old GoodAll paper caps with Sonicap GenI caps, except for the output coupling cap, which is an Auricap (I also increased the value of this cap, resulting in improved bass response). This route was not too expensive, as the Sonicaps are very reasonably priced. All I can say is it sounds GREAT, even though it is mono only.
Currently building the Bob Fitzgerald MPX decoder to convert my Sherwood to stereo. I'll post the results when I'm done.