[R-390] r-390A capacitor question?

[Dave Sampson via R-390]

hello

im not busting any chops here, i simply don't have the experience that many of you have...
lets say that you are replacing all the capacitors in an r-390a for example: and you were quite satisfied with the stock communications grade audio.

would it really make a discernible difference in performance depending on what type of capacitor you used...metalized film, foil/film, polystyrene,  disc ceramic?

ive heard that some sp-600's used disc ceramics throughout (except for the electrolytic of coarse).

would love to hear some opinions
thanks
dave