Hi,
My kit finally arrived and I have the system installed and been playing around with it for past few days. Mostly impressed, and I'm glad I went for the ColorVu cameras. The nighttime image is great, compared to IR black & white for residential property.
Anyways I've figured most things...
From the knowledge already on this website it seems turrets are less likely to get spiders on them as the IR and the Lens are in separate housing. My own HikVision 2MP (my first IP camera) bears testament to this been up almost 6 months with no webs (as oppossed to the old non ip bullet cameras)...