To Whistle

[BigGref]

I would just like to pose a question for you all.

Do you prefer to use pea whistles (like thunderer) or a Fox 40 style of whistle for Football?

I have heard different schools of thinking on this, and would like to get your opinions. Also another question that kind of goes along those lines would be to ask people if they prefer short whistle blasts (then use your voice to communicate with players) or longer whistles which themselves stop plays? I know that different situations may cause for the later to occur (like knee down or not), but lets start by talking about your basic 2nd quarter 8 minutes left, 3.5 yard scrimmage run, nothing to intricate.. then move into more complex situations.

Thanks ahead of time for your posts, go at it!