Higher mega pixel translates to higher noise. I switched to Canon because now Nikon is getting into mega pixel race Canon was in. The change was not without pain, getting rid of my Nikon D90 and the expensive lens. I have compared photos in low light between Mark iii (which I purchased with Amazon just in case I want to returned it) and my friend's D800. D800 obviously has more pixels but also more noise. If I shoot outdoor, I would upgrade to D800 but I am shooting mostly indoor so I am keeping the Mark iii. Also the focus speed and the auto white balance of the Mark iii is much better after careful comparison. My friend was silent after the comparison. I am not saying which one is better, it depends on what you are shooting. The mega pixel hype is to fool those who up to date still have no idea of the concept, no pun intended. You got to be kidding if Nikon or Canon can fool me to buy their camera base on mega pixel count. However, there is one thing I got to say, I am quite upset about Canon's sharp price drop. I am seeing $2995 in some stores, don't know their reputation but I suspect it may be grey market. I paid $3495, what a bummer! Canon, why is the price is so out of control, Nikon is doing a much better job stabilizing the prices? Grey market should only be $200 difference, not $500. I belief this a Canon price tactic, low balling Nikon with grey market after they discovered Nikon's better pricing point. The Mark iii should cost about the same as D800 to manufacture.