How I usually do my racking.

Network Switch
Controller
Music Sources
DA Preamp
DA Amp
Matrix Switch
House Video Sources
Theater Sources
Theater Receiver or Preamp
Theater Amp (if necessary)
Subwoofer Amp (if necessary)
Power Unit (Panamax BlueBolt) w/ vertical rack power bars.

With blanks in between.

I have all Cat lines fed into keystone patch panel at the top of the rack facing the rear.
All speaker wires feed directly to amps.