funny thing is, almost every battery mentioned in this thread so far is manufactured by Johnson Controls.
- American Hardware
- (some) EverStart
- (some) Firestone
- (some) Globe-Union
- Inspira [AGM]
- Kirkland Signature (Costco)
- Power Connection
- Battery Alliance
- (some) Tough One
- Varta [automotive] (pending acquisition)
Johnson Controls Inc., http://www.jci.com/bg
now, of course this does not take into consideration that different companies (i.e. Sears or Costco or AutoZone) have JCI make their batteries to different specs (DieHard > Kirkland > DuraLast, etc.).
in my opinion, just pick a battery in your price range from the brand list above, and know that a $60 battery (DuraLast) is probably
not going to outlast a $110 battery (Interstate).