Apple doesn't play in the low-end market, thus your use of lesser parts (e.g., video card that's $200 cheaper than the iMac's) and leaving out other standard features of all iMacs (802.11n, bluetooth, keyboard, multitouch BT mouse, Thunderbolt, HDCP-compliant display that has an H-IPS panel instead of the lower performing S-IPS panel of your listed display, etc., etc.) contributes to the lower cost. You also don't have an OS on your list. Win 7 Ultimate ($180) is most similar to Lion. So while you can build a PC for less than a iMac, it usually doesn't have the same features, and when you add those features you get very close to the cost of an iMac.
What a ridiculous argument. Bluetooth and Wifi, and apple-brand mice are optional or inferior to a comparably-priced third party item respectively. That display is HDCP compliant, and thunderbolt is both pretty much useless, and (especially in the implementation used in that imac) very much slower than it's rated speed.
H-IPS is superior in some ways, but not all, and with the huge price difference between the PC and mac you could easily get multiple if it had value to you. Win7 ultimate is much more expensive than getting HP OEM for 99$. Basically your argument is facetious.
And why are you incorrectly comparing desktop and mobile video products? The 6790 is ~80-90% as fast the 6970M in 3D games, and identical for desktop and photo performance. If video performance mattered you could easily grab a much more powerful video card with the extra money saved.


