Technical Computer ?'s

I am still looking for some one who knows the parameters of a good trading computer. What is the best, fastest configuration to run the the nastiest chart package out there? What if i choose to have more than one monitor(which i do)? what do i need in the computer to do it well. usb external vga? dual ported vga card or cards? These are some of the questions i still seek the answers too.
thanks for your help in advance
jon mach