It's only more expensive by about 200-400 bucks.
I am a proud owner of Alienware. The only thing i am in shame of, is their tech support. Worst ever. If they can't fix the problem, they tell you to reinstall Windows. If they actually send you a part, chances are, they'll fark it up.
When i bought it, the left door was bent, and was never seated right on the left side. After THREE NEW DOORS, the third FINALLY fits perfectly and everything works like it should.
Also, a month ago, my harddrive fried. I had them send a new one out. First off, it was a Hitachi when i had a Seagate, and two, the SATA portion was BROKEN OFF THE DRIVE. Still haven't sent me a new one. (which reminds me i need to call them up about that...)