[old_tv_nut]

I general, don't replace composition resistors with wirewound, because they may affect frequency response of high frequency circuits. Replacing wirewound with wirewound is a good idea.

1% tolerance is a waste in consumer tube sets, because the variation from tube to tube in a circuit will completely swamp that out. The exception is test equipment where multiple low-gain feedback stabilized sections are used to make the gear maintain calibrated state at least for a while.

In transistor circuits, variations due to the transistor itself are usually much smaller than variations due to passive components.

5% film resistors when replacing other than wirewound are usually not a bad idea.