Hi All, Looking to replace my battery in the 550i and was wondering where the best place to purchase them from, and what "brand" is the current flavour of the month. Are there any pros to buying a Varta as opposed to a Century or Bosch? Looking like needing a DIN88LAGM. I am aware of the process of registering the battery as I have an IBS on it. Any info would be much appreciated! Happy driving!