Hbrandt,
Just one further question for you to ponder: Why the subpanel? By using a subpanel you are inserting another set of electrical connections for everything: positive, neutral and ground. Plus, all of the current for all of your system is being pulled along the one line from the main panel to the subpanel. If the distance from the main panel is not outlandishly excessive, you may have better a result by pulling the 6 dedicated circuits directly from the main panel in uninterrupted runs of cable (provided you have the capacity in your main panel to add the breakers you need.
.
Just one further question for you to ponder: Why the subpanel? By using a subpanel you are inserting another set of electrical connections for everything: positive, neutral and ground. Plus, all of the current for all of your system is being pulled along the one line from the main panel to the subpanel. If the distance from the main panel is not outlandishly excessive, you may have better a result by pulling the 6 dedicated circuits directly from the main panel in uninterrupted runs of cable (provided you have the capacity in your main panel to add the breakers you need.
.