I would go with the Alienware, since it utilizes AMD turion technology over the intel centrino. However I do bet that the INtel based dell one gets better batery life.
I think that paying the extra for mALX is worth it for the AMD Turion and the dual Nvidia 7900 GTX's. But, I thought i better get some other opinions before I go throwing thousands of dollars around.
laptops can hold more mp3s than an Ipod, play better movies that portable DVD players, and play MUCH cooler games than a PSP.
plus I figured that if i got a wireless mouse than there would be no difference between a desktop and my laptop aside from a smaller memory and the option of travel. and the computer teacher lets us use laptops in school and lets us use the schools high speed connection so I could be playing battlefield 2 online when shes not looking.
but if there is a bigger advantage to desktops that I am missing then please inform me because I dont want to be missing out on something here.
Well desktops are much easier to upgrade. Laptops are ALMOST un-upgradable. I would recommend getting a desktop so you can upgrade in the future, but if you're set on a laptop, by all means get it..