As I said in another thread you have going on the subject of PCs Alienware are good, very high quality components etc but are very expensive for what they are. If you took the specification of an Alienware PC and got the same setup minus perhaps the case and lights or whatever but using the same branded components I'm willing to bet you could get it sustantially cheaper.
They are excellent PCs I'm not saying they aren't its just for me they are too expensive.
They are very pretty though and really make a statement, personally I just like a plain old box, my PCs on the floor or next to the floor and I have no real interest in staring at it.
At the end of the day its up to you, you have the money and they are good and look good. I just think you get better value elsewhere.
Perhaps I would feel differently if I had lots of cash to spend on a PC?