I like to get "good" batteries with "great" warranties from an auto parts chain store convenient to you. Optima probably makes the best batteries, but you pay thru the nose. Other general brands are generally equal to eachother. The warranty will be something like free replacement in 2-3 years and prorated refund up to 6-8 years. Beacause of the warranty, get the battery from the local store you usually go to. For me Autozone is the closest and walking distance and 24 hrs. So, when a battery goes, I know I have the warranty there every time. (usually, specialty stuff is a whole other story). If you shop around now and save $10 by driving across town, you'll lock in your warranty if you ever want to cash in on it. So, I say to stay convenient most importantly if you're keeping the car.