Just a small addendum to my Alienware articles. I wanted to note that the GeForce card that came in my system (which I specifically upgraded to when speccing it out) - the GeForce 590 GTX - was noted as having 3 DVI and 1 HDMI outputs. This is incorrect for the card I received, as it came with 3 DVI and 1 mini-Display port outputs.
Also, since I did not have any DVI cables, I had to run out and buy an adapter for my HDMI cable. As a warning to others, this is a Bad Idea. Oh, it works. You get a nice picture and can use your existing HDMI cable. But, the communication between the adapter and the cable gets interrupted every once in a while to the tune of a black screen for between two and ten seconds. Irritating if you are reading or watching something, devastating if you are playing a game. I finally sprung for a new DP cable to stop it. (After getting killed ins everal different games because of the black screen.)
Just something to be aware of.