Whichever you buy, make sure that you check the manufacturing date printed on the battery. I'd suggest you to go for a flooded lead acid battery since dry / maintenance free batteries have a slightly different charging/discharging behaviour and your car's alternator may not be ideal for charging a dry / maintenance free battery. Plus, buy the battery DRY (without acid). Fill it up yourself. Buy distilled water and acid along with the battery separately. Mostly battery sellers use tap water for diluting acid in the battery which destroys the long term life of the battery.