Cable suggestions

Definitely a novice. But figuring this out based on research, advice, and trial / error. Remodeling our home. Have a big, L shaped room with the listening position in front of the short wall with a big offset room behind to the left. 
 

I live in Cave Creek. Have great components. D’Agostino Momentum HD preamp. Currently upgrading my M400 amps to MxV since they are down the street, with Wilson Benesch Resolution speakers with REL 32s. 
 

for my digital side I have an Aurender W20 for my streaming source. Have an Aurender MC10 master clock to time it. But just changed from a Chord DAVE DAC to an MSB Reference DAC which has its own internal clock. 
 

I’ve always used BNC connections from streamer to DAC. But it seems I have two possible issues. 
 

should I use AES EBU connections instead?  And if so, what do you recommend?  Seems that is the better option. And should I get rid of the MC10?  Seems redundant and would free up funds for better cables. 
 

Thank you in advance. I appreciate people’s insight and value your responses. 
 

Cheers