I have an Alienware Aurora it is almost 4 years old. I decided to go with Alienware back then because I could not decide which combination of MOBO, RAM and PSU to buy. Although I did have problems with Radeon HD5870 cards I do not regret buying Alienware it is very solid and reliable platform. Customer and warranty service turned out to be great, they allowed me to cancel original order and make a new one because a more powerful CPU went on sale after I completed original order. They replaced 2 video cards under warranty with no hassle. I only upgrade video cards the case design makes it a breeze. Although BIOS is old it seems to be pretty good too I had no issues upgrading to new Radeon HD 7970 and then GTX Titan.
All boutique builders use off the shelf components the difference is in customer service. You will be overcharged but the advantage is that you will not have to deal with DOA, compatibility and testing issues. My experience suggests that the biggest headache which plagues gaming PCs is video driver Display driver stopped responding and has successfully recovered.
error which could be caused by literally anything. When you negotiate with the selected builder make sure that they test it thoroughly and assure you that they have not encountered the error. But it could be too much to ask because it could be caused by a bug in the driver and there is nothing they can do about it.
You can visit Reseller Ratings
and read the reviews. There is also Maingear
Alienware: Core i7 960 3.2GHz | 12GB RAM | 1.5TB HD | EVGA GTX Titan X | Dell WFP 3008 30" 2560x1600 | Windows 10 Pro 64 Bit