gave you very important remark - you must distinguish between analog decoupling/supply, digital decoupling/supply and analog coupling.
Panasonic FC is for the first purpose but it's nowhere as good as Sanyo OsCon SP, and especially Sanyo WG - the best "digital" 'lytic I have ever tried. Just... transparent. Oscon SP is on a bright/fun side, with accentuated impact. For specific results I recommend Nippon Chemicon KZJ - very warm, rich, tubey sound.
For analog decoupling - it's funny but nothing has beaten Panasonic Pureism and JVC "for audio" in my experiments. I've never tried the Black Gate's but the JVC won over Elna Silmic by a slight margin and over the Cerafine by a higher margin. The former Elna was too creamy, the latter too cold and lacking timbre sometimes. It is allowable to use Jamicon's here, you'll get decent spectrum ends and dark but sweet midrange, kind of losing timbral complexity but acceptable when well paired with other parts.
Panasonic FC and FG - suck in both applications IMHO. Jamicon's are better and cheaper.
For coupling... as a DC coupling fan I say what's been written - best cap is no cap.
Whichever I tried (Wima or other MKP, KSP, etc.) it was making the sound worse.