Upgrade speakers or DAC


Next upgrade is going to be either Front L/R speakers or streamer. Current speakers are Sonus Faber Olympica III, looking to upgrade to Il Cremonese. Streamer is Cambridge Audio Edge NQ looking to upgrade to dCS Rossini APEX.
Which upgrade will make the most significant improvement?

 

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i only listen to music in 2 channel, but current system:

Dedicated 20amp line

AQ Niagara Edison outlet

AQ Dragon power cords and interconnects throughout

AQ Thunderbird Biwire speaker cables for Front LR 

AQ Thunderbird Zero speaker cable for Center Channel

AQ Vodka Ethernet cable

AQ Niagara 7000

McIntosh C2500

McIntosh MC1.2kw (X3 for LCR)

McIntosh MX160

Mcintosh MC207

McIntosh MCD205

Cambridge Audio Edge NQ

Fisher MT-6225 Turntable

PS5

Sonus Faber Olympica III

Sonus Faber Olympica I

Sonus Faber Vox 

REL 212 SE (X2)