Hothardware published a HP ZR30w 30-Inch S-IPS LCD Monitor Review.
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Quote from review: "When given the opportunity to review HP's new 30" ZR30w display, we answered 'yes' without hesitation. We didn't need to hear the rest - the fact that this is a ginormous 30-inch display built around a sexy S-IPS panel is all we needed to know. S-IPS, or Super In-Plane Switching, is the Rolls Royce of display panels and almost always offers significantly better color reproduction and far wider viewing angles than the much more common (and cheaper to produce) Twisted Nematic (TN) panels. S-IPS displays also tend to tap deeper into your gold reserve than TN-based monitors, and when you're talking about 30 inches of screen real estate, things can get expensive awfully quick. Or at least that used to be the case..."
Read full HP ZR30w 30-Inch S-IPS LCD Monitor Review at hothardware.