broadcast

I've just rolled out a site with 10 x DS-2CD2386G2-ISU/SL and a 16 channel 7616NI NVR. Really nice, really impressed with the technology. The cameras have speakers built in, but they aren't great for outdoor use. However, there is a line out so I imagine this could be used with outdoor horn...

Looking for recommendations to compliment a client Broadcast live stream to youtube 1: 4 Cameras 1080p and NVR. 2: low distortion lens 3: PTZ preferred 4: output to vga monitor and output to hdmi monitor (two separate videos)