[thackney]

I would suggest:

Optima Battery Model: D31M
http://www.optimabatteries.com/optima_products/bluetop/specs.php

Capacity: 75 Ah

http://www.amazon.com/Optima-Batteries-8052-161-BlueTop-Purpose/dp/B00099DW6G
$230.49

[editor-surveyor]

A classey solution to be sure, but I believe that our FRiend was looking to keep initial cost as low as possible, thus the $60 battery vs. the $ 200+ battery.

They’re both there on the shelf at Costco, and they both carry the same warranty.