I got two pairs of XLR/RCA adapters, they were OK, no noise or degradation. It was just a test, for an Equalizer I didn't use. I returned them because I didn't need them, but at least I knew they were not problematic.
Get them from Amazon, free return if you don't like them.
You will not get the shielding advantages of XLR, but for home systems, we don't need extra noise protection.
Occasionally, not always, XLR signal is a few db stronger than RCA out of a piece, I'm not sure if you need that, or if you would keep or loose the extra signal strength via the adapters.
Then, there is Real XLR, and improperly implemented XLR, others need to explain the difference.
Home: what I like most is that XLR connectors lock in (not all). I changed all my RCA connectors to Locking Type, so when I mess with any cable, it does not disturb others inadvertently.