Alienware M11x as primary computer?

What do you guys think. Is it worth it to purchase this machine as a primary gaming computer home and away? (hooking it up to a monitor / keyboard when at home)

For $799 you get:

Specs Intel® Pentium™ SU4100 1.3GHz (2MB Cache) Overclockable to 1.73GHz Genuine Windows® 7 Home Premium, 64bit 1GB NVIDIA® GeForce® GT 335M 11.6-inch WideHD 1366x768 (720p) WLED 2GB Dual Channel DDR3 at 800MHz (would upgrade later) 160GB SATAII 5,400RPM Alienware M11x a/b/g/n 2x2 MIMO Wireless

I LOVE its portability and style factor. But I'd want it to last a good 4-5 years. What you think?
EDIT: Are there any other good smaller sized gaming notebooks to compare it with?

Their so damn expensive, but boy do they run well.

I have a dell xps (around 5 years old), the video card just recently went, but I put a new one in and its still faster than most computers.
Dell doesn't mess around with their high end xps models/alienwares.

Word of advice... If you plan to game more than you browse the internet upgrade the screen to 1920 x 1200 resolution.
But if your like me and browse the internet 75% of the time and game 25% keep the 720p. (that's my preferences in laptops at least..... I only go 1080 or higher resolution on a desktop screen)

everybody's talking about this laptop here also...I don;t like it a lot!