Coupling Capacitor upgrade? Which one first?

I ordered New wimas from mouser, I will try them next week.Maybe my amp input wimas are fake ones. Maybe it makes a difference. 
What do you think which one is more important caps, amplifier input or dac output? 

What do you think which one is more important caps, amplifier input or dac output?

Just leave the amp ones in, and leave out the dac ones. But then only use that dac with that amp!

Cheers George

I agree with all of @georgehifi 's comments so won't repeat them. The only thing I can think of that could affect the sound is if the roll off is close to the audio frequencies. Seeing as all the MKS2 caps come with the same pin pitch, you could try the 10µF version (which would move the roll off further away from the audio frequencies) although I still doubt that would make much difference.

+1 for 10uf
Bass will go down another octave "if" it was cutting off a little too early with 4.7uf

Cheers George

Amplifier input cap isn't related to cutoff frequency in this chip amp. (cutoff frequency determined with feedback cap and feedback resistor value wrt to datasheet).
I begin to guess amplifier input cap is much important than dac output caps(if amp doesn't have input cap, then dac output cap becomes have same level importance).
Just I wanted learn you/someone have similar conclusion..


I also don't understand why manufacturers don't have any info about their capacitors. 
I don't expect too much thing from a capacitor. Enough clarity with vocals, good soundtage stage info, good bass, neutral, coherent, neutral tone.. 
Basically it should be transparent(in my perspective it is The same thing with clarity).
I don't know what these words mean in science..