I've had to trench into the concrete slab of a 1958 vintage house to replace the sewer line. The water line is exposed by doing this. I figure that I may as well replace that part of the water line too. The old water line is 3/4 inch copper. What's the best 2019 vintage pipe to use? Copper again?

Under the yard near the house is a 1958 vintage shut off valve for the water line. (A plumber advised me not to try using it.) I want to remove this valve and replace the water line from just upstream of the valve to the point where the line comes up from the slab inside the house. So the new line will connect to the existing copper line in the yard.