Wonders will never cease; a n00b necro that does not suck.
If you can get by how annoying Linus is, and skip his BS skits, the video series they did on buying an OEM gaming system, from a number of vendors, covers the topic well.
We all pick which battles we fight in life, as not everyone is Ron Swanson. Some people do not have the energy or motivation to take out of their lives to learn to configure and build a DIY gaming PC, instead of just buying one. And LTT demonstrated that even then, should anything go wrong, it can be a frustrating experience for the neophyte. Which is why even buying one off the shelf at a Best Buy or the like is a good idea for some people.
The LTT videos definitely reflect that Alienware is among the worst choices though. So, if a clueless consumer does even a little googling, they will quickly see there are better vendors for value, support, and service, than Dell provides. Hence, my answer is no, if I was a n00b I would not buy Alienware, because I would still google the topic beforehand, and there is enough info quickly available to steer you to another S.I.
And least we forget so soon, not long ago you could get a very good value from buying OEM because ram and GPU prices were so high.