Go for the upgraded alternator. Let's just say that Harry (Komodo)'s cap either was not functioning correctly, or not functioning at all. We ended up installing a new alternator and battery after the fiasco. Recently during the short winter period, the brushes of my alternator finally broke off and waved a white flag at me, so I replaced it with the 140A Bosch (did have a 80A Valeo), even though I don't have a single amp/sub in my car and probably never will. It's worth replacing now IMO.