Make sure the battery's have the proper Ah ratings, typically 95Ah and 30Ah.
I strongly suggest locating an OEM or AGM battery. The OEM battery's are considered to be more of a deep cycle battery due to the high capacity they have. Cranking Amps aren't a consideration since this does not indicate the ability to supply high loads for anymore than 30 seconds. Ah relates to high amperage load for extended periods without dropping below minimum voltage limits (typically 10.5 volts).
Again, focus on Ah ratings and skip the marketing hype of Cold cranking amps.
Above all only consider an AGM battery for your car! http://www.whnet.com/4x4/battery.html