Thanks for the replies!
For now I already had an Optiplex 9020 with -->"4th Generation Intel Core Processor I7-4770 (Quad Core HT, 3 .4GHz Turbo, 8MB, w/ HD Graphi cs 4600)"
I have been picking up 8mp Hikvision cameras when I could find them cheap and am now ready to put it all together. I only...