after having intermittent gauge issues due to an aging battery, I did some research on replacements last month. I eventually bought a Ford OEM battery - it was cheaper than any of the other options (including an Optima via the internet), has the Ford factory-type writing/stencilling on it, is the correct physical size, and best of all, they had it in stock at the local dealer!
Regarding Bridgestones, +1 on all the other posts - I've now got around 7K miles on my set (including a bunch of track days), still tread left, better grip, quieter, cheaper. THey're a no-brainer