There is a Catch 22 with balanced cables:
Balanced cables reject external common mode noise, which decreases the chances of that annoying electrical hum;
Balanced cables bond equipment with a ground wire creating another ground path, which increases the chances of that annoying electrical hum.
There are benefits of one to another - both ways. Try each one, the best RCA's and XLR's you can afford. That's the only sure way to answer your question.
Balanced cables reject external common mode noise, which decreases the chances of that annoying electrical hum;
Balanced cables bond equipment with a ground wire creating another ground path, which increases the chances of that annoying electrical hum.
There are benefits of one to another - both ways. Try each one, the best RCA's and XLR's you can afford. That's the only sure way to answer your question.