That depends on you really. Are you going to get in enough of a workout a couple of times a week to burn it off? If so then go ahead and eat it.
Have you considered venison? It's leaner than beef, and some cuts taste almost the same as beef. At our house we also like very lean pork tenderloin, you might try it for a change from poultry. You might also try making turkey burger into meatloaf, shepard's pie, chili or jambolaya. In those dishes my family can't tell the difference between turkey and ground beef.