I'm posting this in the General because the review is really a P4/P3 comparison and not necessarily a P4 review. I don't think it's been posted. Tom at TTT really does a good job with his reviews. He goes to a lot of trouble doing field testing and he talks about things that many reviewers skip. Yeah, he's geeky, but that's okay. I like that he talks fast and assumes you're keeping up. A lot of P2 owners and others are on the fence about getting a P3A/P at half the price or going all out with a P4. This vid might help with the decision.