I used the High RIsk OB clinic for my first child. I was feeling great throughout the pregnancy, but they did many growth ultrasounds to make sure the baby was growing and getting enough nutrition. I delivered naturally in the hospital, but I started bleeding during the first labor pains and bled throughout. The doctors didn't know why plus I had to take antibiotics for Strep B. So the hospital was the best choice. Even though it was the High Risk OB, they didn't push C-section and let me get thru the 40 hours of labor. I was on remicade and switched to humira during the first trimester.
I am now expecting #2 (still on humira) in July and decided to go with an OB. I will still deliver in the hospital (strep B + unknown bleeding last time) but get the one on one of a doctor. Not whoever is working the clinic.
Having CD doesn't have to mean high risk, but I personally feel more comfortable in the hospital in case things are wrong and to repair any damage from natural birth.
Good luck with your pregnancy.