Just wondering, since every item had a link to their website.....Great that some body came up with this, but if it's motivated by the sponsor than why trust what is written? One stop shopping is great, nothing more distracting then having to add 20 to shipping from multiple stores.
Personally I have been building machines since 1990 and often get request from friends and allies to custom build a machine for them (use to have my own business but sold it when it became the job and no longer the hobby, funny how work ruins everything).
More often than not the cheapest route is desired (come on some of us don't have those 100k a year jobs) so scrimping on a lighted case over a plain Jane will save you 50 bucks or more, and that can be added to the video card budget. Besides, unless you plan on entertaining, no one else is going to see how cool the system is but you and the guy who sold it to ya.
I think my pet peeve with all of this is I knew a guy who came back from OIF (Iraq) and got suckered into dumping 2k on a gaming machine, when it could have been done for less than half that. Some people are just greedy, and the worst part was he paid $300 for the case and Power Supply, something that should have cost him $100 if that. Granted he wanted VISTA (why I don't know), but his goal was to play Halo 3 (military seems to love this game).
In the end, research is the key to getting what you want, so take the advice given with a bit of reservation. Do some shopping and ask questions when it isn't perfectly clear.
As my Nuclear Physics Professor use to say, "Oops is not an option"