Should I try XLR?

Short answer:
I don't know.

Long answer:
The benefits of XLR (Balanced) connectors is that they can be run long distances and tend not to be by differences in manufacture.
The key point to remember is that the equipment must support the AES 47 protocol in order to take advantage of those benefits.
Hopefully, Atmasphere will chime in, otherwise, PM him. He can explain this stuff better than I. Plus, he's a great guy to know.
Bob

@gdnrbob Thanks for the response---but I have no idea what AES 47 protocol is. Guess I'll keep the ICs. LOL

very situation and gear specific

A quick search on Marantz website reveals your ND8006 does not have XLR / Balanced outputs! It’s a Single Ended design (RCA outputs only). 
https://www.marantz.com/-/media/files/documentmaster/marantzna/us/nd8006_product_info_sheet_en01.pdf

I'm kinda stumped too, where do you want to use the XLRs at?

Is there a noise issue? No Noise, No problem...

 Good connection though. I use XLR on all power amps that have them..

Regards