thedrop2zero said:Most of the Alienware laptops will get it done. It will be costly though. My Alienware M17 has dual ATI Mobility Radeon HD 3870 CrossfireX enabled video cards, 4GB of RAM, Core 2 T9400 2.53GHz processor, and a 160GB hard drive - all of which cost about $2600.00 USD total. I haven't bought Fallout 3 for the PC, but it should run on high just fine.
The only bad thing I have to say about Alienware is the customer service is terrible. Great computers, but horrible customer service. And don't even get me started on their financing department. Seriously, what company doesn't let you at least check your balance online these days....
I was going to guess you paid 3000 for that customization you got on yours! I'd say what you've got would run any game out there easily! Did you opt for the XP OS or go with the Vista?