I have had my Panny 700 since the beginning of November and have never seen any VB at all. I could not be more happy with this projector, it is perfect for the home cinema with the 2X zoom lens, and horizontal/vertical lens shift, and the picture is truly spectacular.
You can't beat the value of the AE700. I got it with plans to replace it in about a year. After experiencing the picture, I'm sure I'll keep it longer than that...pretty much until I can afford a good 1080 line projector.
I'm using it with a Da-Lite 106" Video Spectra 1.5 and couldn't be happier.