RE: The AuriCaps- What Mr B said, +1. Ditto his comments, RE: Paper in oil as coupling caps(unless you enjoy the colorations/lack of PRaT they offer). Enough of them, combined as a filter bank in a power supply, can add dynamics/effortlessness in a power amp. Black Gates/Rubycon are wonderful in power supplies, but no longer being manufactured. Some suppliers still have large enough values of old stock to be used in a pre amp though.
