timppu: It is just so much easier to just close and put away a laptop, until I decide I want to use it again.
And it's a very good point. My main desktop PC will soon turn 7 and I don't want to throw it away. Yet it takes quite a lot of space ( large tower with plenty of HDD slots). Plus the i7 870 coupled to 16 gb of ram still runs many things more than nicely. (Actually, Attila was the first game I tried where I had to reduce my expectations ) . Buying yet another tower would cause problems. Buying a gaming laptop doesn't.
Still, a laptop is always less durable than a desktop. And gaming laptops withy their powerful GPUs tend to be more fragile, due to heat dissipation problems. My worst experience was with an ASUS ROG that had cost me quite a sum and soon started to develop issues.
Like Timppu said, ASUS has some nice models, even if I happen to have had one bad experience with that range, I tend to think it's a pretty good choice nowadays
Alienware I found overrated. Too expensive for what you get. Some integrators will sell bareabone based laptops that will allow you to get what you want "à la carte" but it's also a pretty expensive solutiuon.
What about MSI then. I haven't kept an eye on them as of late and they tend to have a cyclical record. Sometime quire durable and rather pleasant, sometimes not so pleasant.