CCA is for good cranking ability It is the number of amps a battery can support for 30 seconds at a temperature of 0 degrees F until the battery voltage drops to unusable levels
A 12V battery with a rating of 600 CCA means the battery will provide 600 amps for 30 seconds at 0 degrees before the voltage falls to 7.20 V
The more the better but any of the above will work fine.
I have the Mid Bosch one and it is ideal
