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Yes, you want a smart charger because it's not just about getting it to a set voltage then turning off, you want to do a bulk charge, then absorption then a float charge, from time to time you want to do a gassing charge, where it does "boil" them a little but in a controlled manner, a dumb charger will work but you are going to have to add water to the battery more often and it's not going to last as many years.
The smart chargers also tend to be solid state chargers and they tend to waste less electricity so you will come out ahead with an over all lower cost of ownership by having your battery last longer, using less electricity to charge it and the solid state chargers tend to be sealed up tighter so they last longer as well.
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