Upgrade suggestions for Parasound/Dynaudio system

Here's how it looks now:

Audience AR6T-O
[ MacBook -> Audiophilleo USB to SPDIF ] ->
JPS Digital AC-X
[ Anedio D1 DAC ] ->
JPS Labs Q Interconnect ->
JPS Power AC+
[ Parasound Halo A21 ] ->
JPS Labs Q Speaker Cables ->
Dynaudio Countour S1.4

It sounds great but it's still missing something, I don't know the right word for it but I'd call it "richness". It's like saying I want cream all I have 2% :)

If I could change/upgrade one component, what should it be?

Thanks!