Ok, so got 200 amp alt for my GP3000d, I have a red top under the hood, and a yellow top in the rear, i just found a shop selling red, yellow and blues for a nice price, my question is this, im going to buy 2 batts, wich are the better batts for the rear, since i have 1 yellow already, i was thinking 2 more, and i would be good!! Are the blue top batts better than the yellow tops????