Personally I prefer cameras that take a lower aspect. I see so many cameras up at roof level looking down into a garden, which is great if you like to identify a thief by his bald patch. I would keep both at level A - one each side. What's happening in front of your doors, garage and car is far more important than what's happening up the road. I'd keep a focus on trying to maintain facial detail, particularly at night. And I would go for two 4mm cameras based on what you're showing there.