Gandalf or Gandalv?

Here's the situation. "Gandalf" is pronounced "Gandalv", as the people who have taken the time to flip through the pronounciation appendix would know. But those people are a select group of the population, and literally everybody I know pronounces it with a hard "f" instead of a "v" sound. I myself usually pronounce it with the "f" simply out of habit from my many readings before reading the pronounciation guide. So the question is, will the Peter Jackson movie have enough foresight to pronounce it correctly with the "v", or like how most people would know it to be - the "f"? And which of the two would be better, or would they be equal? I'd say that GandalV would be preferable because it's faithful to Tolkien, but I wouldn't mind GandalF since I'm so used to it anyway.