Lindsay,
You are correct to say that BFG uses native nVIDIA drivers. Not all vendors go this route - they create their own. I didin't mean to imply that BFG had better drivers than Leadtek - I honestly don't know what Leadtek does.
If your card is working and can stand the overclocking (doesn't that void the warranty?) then you should be ok. I'm sure there's something else to spend that $250 on.
[on the oc issue, BFG overclock some of their own cards. this is meant to give their 6800 GT crads similar or better spect to the 6800 Ultra cards.]
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