Thanks James,seeing that,maybe I should've went with a 60a.
It was already ordered,I thought i could use my 20a for the components and the 2X4B-ssts,
and the 45a for the sub +7B-ssts(65a Total)I could pay the shipping fees on the 45 and reorder a 60a.
I use the 4bs for the surrounds,which I'm sure they won't want much.
James the the 60a should be about right for the 3X7Bs.
I'M NOT SMART,BUT I LIFT HEAVY THINGS