Get it only if your main concern is about portability and not gaming 
Below are some drawbacks:
1. Very loud fan when on load
2. Screen refresh rate and performance drops significantly when on battery
3. High performance on battery will cause auto-shutdown
4. M14x with normal HDD will get hot on the right palm rest
5. Keyboard and touchpad lights doesn't light up during start up (only applicable to advance lighting settings)
6. Buttons are abit far apart (my own opinion hehe) 

Other than that, its basically a very awesome 14" machine 

I meant if you emphasize portability over gaming, then get the M14x.
If not, you'd probably be better off with the much better Asus, Sager models (can get GTX560M already with that budget). Perhaps even the AW M15x 

dude, ur budget for a laptop? well, u cant direct compare within  Asus and AW, where this 2 made up of different material as well

You need to have specific models for comparisons
Asus offers so many lines of laptops, so does Alienware