My personal go to coupling caps are Vitamin Q PIOs and Obbligatto Polypropelene caps. The Obbligattos are a steal for how good they sound.
FOr active filters I would recommend Polystyrenes like Multicap RTX, Relcap RTE or old NOS phillips polystyrene.
The latter 3 are very clean, crisp and detailed in their sound charecteristics.