Matt,
I did the exact same thing; Batteries Plus had the best price on wet cell 8Ds with high cold cranking amps. Now you're set - no more worrying about the engine not cranking when you turn the key.
http://www.survivalunlimited.com/bat...werpulse12.htm
The Power Pulse is the best $68 you ever spend; it doubled the life of my starting batteries. Check it out!