Do you use a custom Power Cord on a Power Conditioner?

I have an APC H10 Power Conditioner.  It came with a beefy power cable, and I don't have any problems.  But, I am wondering about how a custom PC may help my system.  Since it already has a heavy duty cord, would it be better to put one between the conditioner and the Integrated?  

Maybe this is a better question...  I am using a vintage TT, Manley Chinook, Primaluna HP Integrated, and the APC Power Conditioner.  If you were buying only one new Power Cable to test the PC waters, which one would you start with?