The Apple iMac 21.5-inch (Core 2 Duo), the "baby brother" to the 27-inch iMac, is $500 less expensive, yet has much of same power. It slots easily into the niche between the cheap nettops and the expensive HDTV-replacement PCs: it's the all in one multimedia PC to buy if you need performance more than fancy features like touchscreens and HDTV inputs.