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The good: Largest display among all-in-ones; fast dual-core CPU makes up for lack of quad-core (mostly); finally has an SD card slot; wireless mouse and keyboard; Mini DisplayPort input ripe with possibility.

The bad: Most Windows all-in-ones in the price range have Blu-ray; touch-sensitive mouse gestures not as responsive as we'd like; Apple's nickel-and-dime customer service policy.

The bottom line: Apple's new 27-inch iMac will charm plenty of you with its screen size alone. Fortunately, that won't lead you astray. Behind its expansive display, Apple has packed one of the fastest all-in-ones available, and added a few useful extras to sweeten the deal. This iMac isn't perfect, but its positives far outweigh its negatives. We can think of few users to whom we wouldn't recommend this system
The new screen size makes the iMac the largest ever in Apple's all-in-one line, but only by an extra 3 inches in its width. The new iMac measures 20.5 inches high by 25.5 inches wide by 8 inches deep. The old 24-inch iMac is only 22.3 inches wide, but otherwise has the same dimensions. The extra inches in the screen have a more significant impact than the changes in chassis size.

In addition to going to a 27-inch LCD, Apple has also boosted the resolution of the display to 2,560x1,440 pixels--up from 1,920x1,200 pixels in the old model--which amounts to roughly 62 percent more screen real estate. Where the old model couldn't quite accommodate two full-size Safari windows, the new iMac can fit two side by side with room to spare