I'm interested in a juicer for juicing carrots. What is the best juicer for juicing carrots and why?

Each type of juicer has its pros and cons.. You might want to read:
The Best Juicer Article that explains the various methods of juicing and the different kinds of juicers.

I personally prefer the centrifugal ejection juicer because its fast, easy to use and easy to clean. (such as the omega 4000), of course if you want the highest nutrient quality, the green life would be superior, but its a bit harder to clean...