Now, now, let's be nice. I know a lot of Buffy fans don't like Twilight (I myself being one of them), however there are some Buffy fans who DO like Twilight and we should respect that.
I did make my own little
link and added it to the spot a while back. But to be fair to Twilight-friendly Buffy fans, let's try and keep this spot Twilight-tolerant.
So, in respect for everyone's opinion, I, personally, don't think Buffy would get along with Edward or Bella. Realistically, considering Edward and the other Cullens' apparently good nature in the series, I don't think she would STAKE them. But I don't think Buffy, nor the rest of the gang, would like them much either. For their part, I don't think the Cullens would be fond of Buffy.
Also, Joss Whedon did mention that if Edward were ever to face off against Angelus, Angelus would win. As Joss put it,
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