You are absolutely right on the minimum and suitable cable sections, but don't help with fans. They are more concerned with the characterics of certain brands or types. For example, silver cables are generally brighter than coppor cables and cyrstal length will affect the capacity and resistance to the currency. VDH turns out to be more balanced compared ONIX that cares more about bass punch.
There is no absolute good or bad cables. It is all about personal favors and the team play between different components.