how much does the big 3 actually help? my stock alt is 100A and i'm running a 1000 watt amp that draws 80A and a 4 channel thats 500 watts and draws 40A and i'm thinking of getting 2nd 1000 watt amp. Will the big 3 let me run all of this or will I need a HO ALT too. They don't make HO Alt for...