yep, i agree with lifter. unless you have experience making roast beef or have a proper bbq, i would go with a good pot roast.
i make a plate of some spices; mostly black pepper and sea salt, dried oregano, basil, thyme, garlic powder, and paprika. wash the roast, shake off excess water, roll in spices, and rub them well into the meat. in heavy bottom stock pot or dutch oven, heavily sear the roast on all sides in light olive oil or canola oil. turn the heat to low, and add water (or beef broth, beer, wine, whatever you prefer) until 1/3rd to 1/2 of the roast is submerged. simmer on low for about 2 hours, then add 5 or 6 halved stalks of celery, 3 large quartered onions, and a few halved carrots. simmer for at least another half hour or so, until the veggies are tender.
remove the roast and veggies, and reduce the remaining liquid, adding a flour slurry to thicken it into a gravy. (you could make a roux to add to it if you don't like raw flour slurries). serve with mashed potatoes.