"Ignorance?" I see, you argue by insult.
As long as we're on the topic of ignorance, why do you ignore the more obvious comparison? The stock model here,
http://alienware.com/Configurator_P...SysCode=PC-AREA51-7500-R5&SubCode=SKU-DEFAULT
(heavens only knows how long that link will continue to work, but it's the Alienware Area-51 7500 stock model) well, this stock model ships at $1200, which is $268 cheaper than the cheapest 20" iMac after you slap on three years of Applecare. Now, the Alienware comes with a mere one year warranty, and you'd have to spend an extra $190 for the next two years... but you don't have to, because... yes, you guessed it...
UNLIKE THE IMAC, YOU CAN SERVICE IT YOURSELF.
In my book--and, I suppose, you might think it a consequence of my "ignorance"--that is a superior design, and trivially so.
There is more to be said, of course. The Alienware lets you choose whatever monitor you want, so you can spend less than $200 for a monitor that is vastly superior to the iMac's,
http://www.newegg.com/Product/Product.aspx?Item=N82E16824112007
or, or course, spend around $600 for something more or less as nice as the 23" ACD.
BUT WAIT, THERE'S MORE FROM THIS "IGNORANT" RANT:
You can also, sooner, or later, as you desire, add one, two, or three hard drives. Hey, just like with a Mac Pro! And, later, you can upgrade the video card... well, maybe like with a Mac Pro (if Steve gets around to giving you the drivers, a linux-like experience that all "knowledgeable" Apple people seek to avoid). And the RAM... well, it seems that this is the one place where the Alienware machine is a bit sucky, as it only goes up to the same 4GB of RAM as the iMac.
There's other considerations, of course--e.g. the possibility of upgrading the CPUs as time goes on, or the superior ventilation of that case over the all-in-absurdly-skinny-one design of the iMac.
And if you fritz your monitor--or your best friend hits it with his beer mug--hey, you don't have to toss your entire computer, you just replace the monitor and you are on your way to post another "knowledgeable" followup on macrumors!
Wow, how "ignorant" of us, to imagine that this option could possibly trump the option for an iMac.
You know what would close the deal, of course: the ability to run OSX. So if this thing can be hackintoshed, that's it, end of argument, obvious superior choice for less money. For now, Steve makes that a bit tricky; if he makes it even harder, then maybe we'll start to reconsider whether it is better to continue to put up with inferior--yet expensive--hardware for the sake of an ever-inclosing OS X, or to bite the bullet and dive (back, for some of us) into linux.
But I suspect that the hackintosh idea will continue to be technically viable, and to the extent that "knowledgeable" iMac shoppers continue to pony up too many dollars for inferior hardware, then the "ignorant" rest will have the opportunity to hack their machines to boot whatever OS they want.