In a large saucepan, combine water, salt and sugar. Cook and stir over medium heat until salt and sugar are dissolved.
Remove from heat and stir in ice water to bring brine to room temperature. Place pork chops in a large, zip-top plastic bag. Pour the brine over the chops and seal the bag, pressing out as much air as possible. Place in a large baking dish and refrigerate for 8-12 hours.
Remove chops from brine; discard brine. Rinse pork chops and pat dry. Brush pork chops with oil
In a small bowl, combine paprika, garlic powder, onion powder, cumin, ground mustard, pepper, chili powder and grown sugar. Rub over pork chops. Let chops stand at room temperature for 20-30 minutes.
Preheat grill for medium heat. Grill chops, covered, for about 4-6 minutes per side, or until a thermometer inserted in the center reads 145 degrees. Let stand 5 minutes before serving.