Crown has a 6 ch x 60w 70v amp if you are just needing many channels but not a lot of power per zone. If the amp inputs are 2 feet from the vaux outputs you really don't need to run the inputs balanced. If it was all commercial gear with balanced inputs and outputs then sure hook it up all balanced, but it is not needed to go 2 feet.

The DBX Zonepro units do work very well or the Symetrix equivalent zone mix 761 or Jupiter series.