That article does a good job of pointing out the color variation issues with LED-backlit displays. I would concur with the article’s conclusion that if color accuracy is most important, the LED’s are not the best option. LED’s tend to get hot, and that heat will tend to cause things to change color, and finding a way to deal with that heat is a puzzle for the manufacturers of these displays. I know our Eizo rep said the last time he was in town, that Eizo hasn’t come out with an LED display yet because they are still working on how to “do it right.”
If it’s a choice between the Eizo 222 and the LaCie 720, then I guess you would go for the LaCie if you expect to deal with images that will get that saturated. (If you do portrait photography for example, you would not need this display.) If accuracy is your emphasis, go for the Eizo. Since you are used to an Artisan, either of these displays will knock your socks off!