I have only seen Price live. I've seen them on TV 3-8 times each. Personally, I'm kind of partial to Pavelec myself, although I don't pretend that my crystal ball with regards to goaltending prospects is anything but muddy. You could probably adopt a policy of taking the exact opposite of anything I say about goalies and come out better off more often than not.
I guess I also let a misleading self-deception sneak into my evaluation in that Pavelec is just the one who seems flashiest to me, and plays above my expectations at times, whereas Bernier and Price have had such high profiles for so long, and yet in my relatively few observations of them, they've had some mediocre showings, despite all the technical praise they get from the real scouting communities. I guess if you're projecting purely on observing physical skill and technique, that helps make up the gap. Personally, I sometimes get carried away with the intangible "wow factor", and for whatever reason I've just randomly happened to be wow'ed more by Pavelec than the other two. (Not to say that the other two haven't have had plenty of wow moments themselves, just that I didn't happen to see them). But then, sometimes Martin Brodeur fails to "wow" me too... yet at the end of the day, look at his accomplishments! You'd have absolutely no trouble finding tons of "wow" games in his track record too, even if a random sampling left you instead seeing a few games that made you wonder what all the fuss was about. Price and Bernier give me cautious reminders of that trap sometimes too.
FWIW.