To expound on Noteworthy's comment about Alienware and the legitmacy of hate I can assure you is true. Alienware laptops are known for having heating issues. I bought one back in late 2007 (yes, I know this is 5 1/2 years ago, but it illustrates the issue). The system ran well for a year, but it always ran hot. I even bought a cooling pad for it. About one week after the laptop hit the one year anniversary mark, it overheated and died. I called Alienware technical support and they refused to help because I didn't purchase an extended warranty (warranty was only one year) and they would not allow me to purchase an extended warranty after the fact (you bought it when you go the laptop or you didn't get it). So, basically after one year's use, I had a $2000 doorstop. After that experience, I will never, ever, buy another Alienware laptop again.
As it stand, I pretty much stick to Asus laptops now, they're fairly well made and Asus believes in giving their gaming laptops adequate cooling (I have a G74). Asus gaming laptops are a bit more pricey, but IMO, it's worth it.