xeons already have a luxury tax...
and while it doesn't make that much of a difference in the total their case was 160 bucks.. motherboard 280 bucks.. going mATX really bites. and get this, 50-75 bucks for bluetooth and wifi(wtf??).
and then going for luxury taxed firepro's. 3400 bucks each. the point with going with the pc is that you can choose something else as well. heck, you get a monster of a machine just by going with two 1000 bucks gaming cards, if you don't need that bit switched on to make it a "pro opengl" card(or just nvidias "pro" cards, either way you would shave off a whopping 4800 bucks!! that's nearly HALF OF THE FUCKING PRICE for no practical performance loss - or heck, maybe even a gain).
it's their choice of parts that makes it expensive as hell, not the choice of where they priced them from.
*luxury tax here refers to paying for something someone just building a pc at home with their own money would never buy... something that is marked up just because some companies don't give a shit.
It's not really a useful comparison if you do not go for, as far as possible, the exact same specs on the PC side. What is the point in saying "well, our PC does not have the same components and it's slower, but IT IS CHEAPER!". They wanted to find out if Apple is putting the usual "luxury tax" on the hardware and it seems that this time, they did not do that - if you choose the same or very similar PC components (e.g. THE SAME graphics cards and not "ah well, just as fast in games and who cares about certified drivers and more RAM for professional software anyway" gamer cards), the PC will be more expensive.