Coupling Capacitor upgrade? Which one first?

What's in place at the moment make/model/value uf and volts, polarized or non-polarized 

Cheers George

Dac is altmann attraction dac with 3.3uf wima mks2 63vdc output coupling caps. Amplifier is a diy chip integrated amplifier with 4.7uf wima mks2 63vdc  input caps.
Both working with 12v.Using 35v plus will be enough I think. 
Source is linear psu powered esi juli xte sound card. Speakers fostex full range bass reflex.

I tried to change wima leads with non-magnetic leads. There was an improve ment.
I also tried to use beeswax filled electrolytic cap(it is a diy effort) for input of the amp.I started to get soundstage information and vocals had more clarity.
But electrolytic caps seems unstable performance for dc blocking. And I realized a good cap can be very good :)

Still I don’t understand why wima caps aren’t good enough. But I decided to try a good cap. But they are pretty expensive and probably all of their website has no information about their products.

Audiocap rt or theta ppt
Jantzen alumen z cap
Rike audio s cap 2
Jupiter condenser beeswax ht or wax ht
Lefson c-mod
Intertechnik audyn tri reference
Clarity Cap cmr
Audience auricap xo
Jantzen superior z cap
Mundorf supreme evo oil

These are all I listed from reading all over the internet.. :)

I really like Cornel Dubilier over Wima's.

Cheap, small. Worth trying.