Balanced vs. Single Ended Interconnects

Stay with your AQ RCA cables until you can buy a good set of XLR cables.  Buying the monoprice XLR is throwing $20 away. They won’t beat your audioquest cables. 
Also, my recommendation is to make bigger steps while upgrading. So if you want to stay with AQ go up to something like the Wind. Bypass the Red River. Or get better cables from another brand but stay in a price range of around $300-$500 for a used pair.

In addition to being a lifelong audiophile, I've done mobile  sound reinforcement work as a "geezer jockey". 50-Foot cable runs between components left balanced XLR connections between BALANCED components indispensable in terms of eliminating EMI and RFI. I always used "Canare" cables with gold XLR connectors. And I never had a reason to use anything different. I've also compared Canares between my home audio components; and compared them to pure silver Audio Magic RCA interconnects which lock securely to the RCA jacks on my components. And I'm hard pressed to hear any difference in SQ. So I stick with my Audio Magic cable dimp[ly because I've invested hundreds of dollars in them.

I'm sure that I could borrow cables from a friend.  I am a fan of Blue Jeans Cables, but it would cost $60 plus shipping which is starting to be a significant amount of the $200ish that I'll eventually spend on Audioquest Red River cables.  I think the Monoprice cables would run under $20 and I have been using them at my church for quite a few years without issue.

@mceljo maybe the padre would let you borrow a set to try at home?
If they work fine at church, they should work at home.

I got off RCA more than 30 years ago.  Never going back.

My whole system runs balanced; that is truly balanced, not just single-ended terminated with XLRs.

I’d recommend the “World’s Best Cables” as a solid trial for xlr’s using quality mogami or canare cabling. They’re also very well terminated, most with neutrik connectors. Was a bit skeptical until I purchased a set and saw how well they’re made. Roughly $40 on Amazon and we’ll worth it. They sound VERY good, balanced, detailed. They claim a long burn in and I’m inclined to believe it as they have “opened” over time.