Just wondering if any of you have had one of your headlights go out...I was driving home last night and noticed that my right headlight is out. Is it normal for one of them to go so soon? I only have 15k miles. Also, any idea of the cost of replacement? I don't think this would be under warranty, although it would be nice. Any better aftermarket bulbs that anyone suggests? And are they hard to replace yourself or should I just take it to my dealer? Thanks for your help.