You're running late. The time to pin this down is before you run the wires! If even one wire is short, you have to compromise on how you route the wires.
If just hanging the wires I'd bring 'em out in bundles of an inch or less diameter. Larger bundles are less flexible, so they eat up front-to-back space as well as putting strain on the wires where they transition from hanging to attached.
The hinged rails used in the MA Axxess series are even better. They add six feet for going from wall to rack plus the wire needed to go down the wall to the rails, then up the rack to the equipment. It's not unusual for this to add a dozen feet to each wire run!
It's best to figure this out before running cables!
A good answer is easier with a clear question giving the make and model of everything. "The biggest problem in communication is the illusion that it has taken place." -- G. “Bernie” Shaw
