XLR connectors

AQ makes good cables. I used to have their Diamond usb cable which at the time was the best usb cable you can but, this was probably 5 or 6 years ago. The last time I listened to various AQ cables, I would start with the Colorado version and go up from their (these are no longer made but I think the new model might be the Earth or Wind). The cables below Colorado had too many flaws for my tastes

With longer runs for interconnects, XLR definitely is better.  With my 18" wiring, I hear no difference when I switch from one to the other.  The XLR will stay plugged in, but I sent and amp module back for repair, and it was good.  I had a bad XLR adapter (Different amp)  from guess who, Radio Shack.   

Oyaide makes the best

For the money, and you have to spend a lot to maybe get better is Neutrik and one I don’t think has been mentioned yet, but used a lot in the pro world is Switchcraft. A lot of well known cable manufacturers and probably in our kits use these jacks. Very well made and made to take abuse way beyond what anyone will see in their home, hopefully.

I have Furutech xlr on my dac as well as integrated amp 
and I am using the 601,602gold over very high a copper content phosphor bronze Cryo treated  and very nicely made .