PC World Test Center image evaluations are still pending (we'll add them to this review as soon as they're ready), but I put the OptX 2210 through its paces with a PlayStation 3 and Uncharted: Drake's Fortune. To my eyes, the monitor performed excellently. I tend to be a stickler about input lag issues, but I didn't notice any problems with response time, ghosting, or any other problems commonly associated with monitor-overdrive functions in the past. I also didn't notice any benefit of using the Gaming preset configuration, which merely to turn the brightness and color warmth down a notch from the Standard preset.
One edge that the OptX 2210 has over its less-expensive Dell cousin is the Premium Panel Guarantee, which is more stringent than the standard Dell three-year limited warranty: If you find a single bright or stuck pixel, you can exchange the monitor for a brand-new one. (Many monitor warranties won't promise you a replacement unit unless the number of dead or stuck pixels reaches a certain threshold.) The default warranty lasts for three years, though you can purchase a four-year warranty for $40 or a five-year one for $60.
Though $300 is a lot to pay for a 21.5-inch monitor, the Alienware OptX AW2210 display has plenty of virtues to justify the price, and the extra warranty coverage ensures that you can enjoy your investment at maximum visual quality. Stop by our monitor reviews page or our Monitor Buying Guide to see what other models fall into your price range.