For a Dual LCD-Monitor set-up, what internal hardware (e.g. video cards x2 or graphics card x2) will I need?

There are several options, however the easiest is to purchase a SINGLE video card that suport dual-head display. They can be found for less than $100 US, probably for about $50 US if you do some real looking. It will provide you with creat performance and exactly what you are looking for.|||Graphics card x2 - that's usually it.