Right, hedgehog?! One of the most mystifying-to-me things in perfectionist Hi-Fi is why pickup arm wiring and phono amps aren't commonly and routinely done balanced. Pickups are inherently balanced devices, yet that built-in advantage is squandered. Why?!
There are a few designers and companies offering balanced phono stages; Ralph Karsten at Atma-Sphere, of course, and Peter Noerbaek at Liberty Audio (the B2B-1 used in pairs). I imagine there are others. That should change, asap! On the other hand, a fair number of perfectionist arms are offered with their internal wiring terminated in XLR's.