BB is OK price wise but, I am generally seeing 20% savings on their prices buying through the trade. I tend to recommend Hikvision DS-7608NI-I2-8P as an 8 channel POE NVR. Pay the extra for the I over the K series as it has more bandwidth and a faster processor. For most domestic cameras I see little point in going to 8mp (4k) as in most cases it does little more than eat up bandwidth and storage and requires a greater processor overhead. H265+ has limitations and is not ideal for busy scenes where more than 30% of the image is constantly changing, again it puts a lot of overhead on the processor. Prosumer CCTV, for a decent install takes a bit of planning and knowledge of both the cameras and NVRs. I think that you are right asking the questions that you are asking. 2 of my cameras are 6 year old 1080p cameras and although they are showing their age a little, they give good duty for general surveillance, they dont fair to well at intrusion detection, especially compared to me AcuSense cameras, which have better AI (but far from perfect).