I'm in agreement with Bram on buying a battery that's adequate for the project. You'll be doing a fair amount of engine cranking and accessory installing, maybe you should consider something really good. Will you be doing a high-power stereo install? Fitting driving lights? Using air conditioning? you may be ahead in the long run with a good fullsized battery.
If you will be removing the battery often to perform repairs, marine-style terminals may be more convenient for you. And marine batteries are a compromise design which tolerates deep-cycling(full discharge-full recharge)better than automotive types. Just another idea to mull over.