There are users of V3 monos who, for various reasons want to run long interconnect cables. That would be another reason you might find people using balanced cables for that particular use case (but this is not yours). They sound great, and I still can't quite get my head around the power vs size of these class D's. Fit beautifully under my tv.i dont have any balanced cables, so i cant try for myself.
if there is no benefit i will leave as it is