Balanced vs. Single Ended Interconnects

It’s not a choice between Monoprice and (overpriced, IMO) audiophile cables. As @audphile1 suggested, Blue Jeans can supply very nice cables, or you can get cables of Mogami W2549 and Neutrik connectors made up by pro audio shops or from Worlds Best Cables.

Migami W2549 with Neutrik gold connectors is what I use. I had them made up by ProAudioLA. In the 7m length I’m using, they are less colored than audiophile cables I’ve tried -- and cost 1/15 as much.

The quality of the cable is of first priority in each case where I have compared. I think it unlikely budget XLR will unlikely ever best high quality RCA. But the difference is strongly component dependent.

I currently have all Audio Research Reference gear. Audio Research recommends XLR. I have tried both… there was no obvious difference. Since I was upgrading, I went ahead and swapped my RCA out for XLR. But, I did it mostly just to be sure. Less expensive RCA cables made a big difference… in a bad way. I found mostly it was about the cable quality.

@mceljo You’ve invested in good components so wait and get good XLR interconnects. The cheap Monoprice cables are only good to keep around for when you’re upgrading and are in between cables and don’t want to be left without music.

And even then, for this purpose I’d resort to something like BlueJeans or Mogami, not Monoprice. 

Assuming they are short, and you aren't near a radio station I know I'd be hard pressed to tell a difference.

No you have a true balanced components and a cheap junky XLR will be of no real benefit. 
 

Wait get a quality XLR to maximize the performance of these components. 

One reason why many prefer rca is that there are many more quality cables available.  That is a very nice amp and you will benefit from a pair of high quality interconnects.  there is absolutely no reason to go balanced on a short run.

Jerry