I use the chimney as well. When I grill steaks, I use a "ton" of charcoal to generate very high heat. To make it worth my while, I will prepare a second grill item to cook low and slow for the next day, after my steaks are cooked.
To me, the ideal is to buy (on sale of course), a thick premium steak, Porterhouse is my favorite. Buy the steaks several days before cooking to allow excess fluids to drain or evaporate. Coat the outside of the steak with salt, pepper, garlic powder, and onion powder while waiting for the charcoal.
Place on the hot grill uncovered for thirty seconds, a fire will break out, and give you a nice char. After twenty or so seconds, turn steaks at a ninety degree angle for a diamond shaped grill mark. Then put the cover on the grill, with the top vent 3/4 closed, (the smoke will kill the open flame), for two to two and one half minutes.
Turn the steaks and repeat the process. Allow the meat to stand for three to five minutes before serving. I know the above is nothing new or earth
shaking, but it's foolproof.