Ill be running a Crescendo 3500 @ half ohm, stock (110 amp) alt, one run of pos and one of neg in 1/0 to the back, starter battery is a Odyssey PC1700. Should i get 2 D3100's for the back or upgrade the front battery to a D3400 and get one D3100 for the back. This setup will be for daily and demos, i have zero plans for competition. I know the more electrical the better but im trying to stay on a budget of about 600 dollars.