I assume one would go with an HP Blackbird for one of two reasons. 1) Don't think you are knowledgeable enough to build your own machine (seriously, it isn't hard) or 2) Just don't have the time to spec out and price components and put them together... or actually just really likes the look of the HP.
Either way is fine with me if you want to spend the $$$.
Maybe... I'm in the same boat as you, so maybe I overestimate peoples' ability, but it seriously boils down to selecting components and slapping them together.You'd be very very very surprised how hard it is for a lot of people. I've been doing this sort of thing since I was a kid, so I don't find it even remotely difficult, but a lot of people find it a very daunting task. Especially when you start meddling with electricity, things get really hairy really quick.
I hadn't really considered some of the technical aspects...Plus the average person wouldn't know about your motherboard capabilities and what to order without doing some research... whether its socket 775 etc and if it support a certain type of stuff.
