Hello I have the Dell XPS 435 which is basically the same computer. Dell changed the name to Studio XPS 9000.
It's a great computer! I recomend that you have at least 6GB of ram, because Windows Vista 64 bit always uses 1.5GB of ram. When I click on Dell Support Center then click system information and click memory it shows you "Total Memory" and "Available Memory" which is always 4.5GB. Also this computer is very big and weighs over 40 pounds. I paid $1,419.00 for the computer alone. The price of the computer is not bad considering that the computer comes with a 23" monitor. You will also be able to play the latest games, I play Crysis all the time.
This computer is fast!