I'm looking to replace my really old OptiPlex 3010. I have 16 cameras, 10 5442s, the rest a mix of 5MP and 4MP... all running CPAI. I need help selecting the right PC and GPU card. I've spent a lot of time looking at different setups, just can't pull the trigger. My budget is ~$600 for the PC and GPU, any suggestions would be MUCH appreciated!