I'm going to build steps for a friend using Paver type blocks in a half circle. There going to butt ajainst the existing concrete porch. The steps will be approx 7ft wide and in the center 43in deep. There are 3 old steps and then the landing now so I need to rebuild 3 steps. Overall height from ground to top of landing is approx 27in. Whats a good block for this project? Any ideas you might have for me would be helpfull. Thanks in advance.