[BC] 3 phase power and audio

[engineermike]

Hey folks,
   Here's a new one for you.  In the past it's always been good practice to try 
and keep all your audio on the same phase of a 3 phase circuit to keep problems 
to a minimum but with todays new technology such as the Axia system and similar 
what are the thoughts?  I ask this because I'm running about 20 amps on the 
neutral of our 3 phase right now because it's unbalanced and the campus would 
like to balance the phases before we install a battery backup and such.  The 
folks at Axia are kicking this around as well but I thought it get everyone 
else's opinion as well.
Thanks in advance
Mike