If RFI is a problem (and it isn't in the vast majority of home
installations), the way to deal with it is through 1) balanced inputs,

RFI means Radio Frequency Interference. Balanced inputs on audio equipment
almost never have significant common mode rejection at radio frequencies.
My guess is that RFI will not be reduced by using a balanced input. Better
shielding might be a help, as would filtering out the high frequencies. If
the signal is digital, RFI can be eliminated by using an optical
interconnect.

Norm Strong