I noticed in the forums that the choice tends to be between either the entry level 21.5" or the high end 27". I recently purchased the mid range 21.5" and I must say that I am a happy camper! The screen is very nice, despite a bit of yellowing on the right side, and the WD 1 Tera drive is blistering fast and not as noisy as some would like you to believe. Oh and the native res gaming is superb! Sure, the 27" screen gives you a significantly greater amount of real estate but it is nO retina display. In fact it has only a couple of more dpi than the 21.5", consumes way more power and is very taxing on the gpu if playing games at native res. So at least for me it works out very well. Hope that helps for those that are still deciding what to get.