I would never spend money on a CPU costing over $200, a case over $100, or a SLI/ CF set up but then I understand my tastes are not other people's
Suggesting builds period on the forums period then is pointless. Since its not my or your money. Let me put it another way. I would never put that kind hardware in a laptop period. I would always go with a desktop alternative unless that machine has to be portable of course.
I agree with everyone else - the Alienware has better Graphics cards but the HP has a better processor. I Wouldnt buy either though. I would save money and get a better product by building one myself. BUT you cant build a laptop youself so easily, so if you want a laptop then buy the laptop........
Well its a bit like asking which is a better deal, a $10'000 Harley Davidson motorcycle or a $10'000 SUV.
I mean whats the point in comparing a laptop to a desktop? You will always get better performance from a desktop for the amount of money you spend, but you cant take a desktop on the bus. And its true - you dont find that many people who build their own laptop.