Higher resolution more pixel- more pixels less cameras-money saved
Why it is always better to install high resolution cameras, because it has more pixels which means clear picture.A 700 TVL camera is better then 480TVL and 1.3 MP ( mega pixel) is better 700 TVL so and so forth.
A triplex DVR or NVR is always better then Analog DVR, because you can add different types of cameras in the same system.Scalability you can add IP cameras for very high resolution,few HD-TVI cameras for quality and affordability. www.dvrunlimited.com for every budget. We have something for every installer high tech or no tech we can help every tech.