If the 4800 will fit, get the 4800. don't even bother with 3200 or 3600. You should try to have the same battery that way your car will drive the same. I have both 4800 and 3200. Each battery weight different and the power curve is different.
The only reason I got the 3200 is becasue it will fit mini cooper like a stick pack and my Tamiya 415 MRE. The 4800 is too tall to fit in those cars. If you run the buggy, truck, the 4800 should fit no problem.
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