I’m going to ask for consideration of another perspective re subs. I lived with two subs for more than 20 years (double Dahlquist DQ1Ws with DQ10’s). The subs added a lot in terms of dynamic range and weight, but always compromised the imaging, especially in terms of depth. The complexity of the setup was also leading to issues, with more things to go wrong. When I changed my speakers (to ATC’s, I found I never missed the lowest frequencies as the image and sound was more coherent.
I would suggest your streaming setup is the area most profitably improved. Finding a used Aurender N10 if you want a single box or else an Aurender N150 combined with one of the Yggdrasils would be nice.