I am going to be doing a guage replacement with a 2003 Chevy HD2500. Having the carputer feed the speed, RPM and fuel info to a 7 inch screen. I think i am going to use OBDlink for the USB interface. What should I be looking for as far as a montherboard and CPU so I have minimal or no lag and fast real-time response to the LCD screen? Anyone have a setup like this that they really like?