Last Sunday I attended a grilling class (my wife signed me up) and they had a Big Green Egg (BGE) there. They cooked ribs, chicken, steak, and pork on the BGE, a high quality gas grill, and a infrared grill. All meats were seasoned the same for all three cooking methods.
The ribs were done first due to the long cooking time followed by the steak, chicken, and pork. I and most of the people in the class liked the ribs from the BGE better than those from either of the other grills. However, I preferred the steak, chicken, and pork from the gas grill because the BGE imparted a smokey flavor to these meats that I wasn't fond of. Other people liked it though.
The BGE comes in four sizes and with the bench necessary to hold it, can run over $1000. If you like to grill with charcoal, the BGE is probably your best choice. If you don't mind using a gas grill the BGE is still a good choice but maybe not the best one depending on what flavors you like.