The party that is paying for the title insurance has the right to select both the title insurer and the title company. A real estate agent, either for the buyer or the seller usually recommends a specific title company, but it is actually the party paying that has the right to make the final decision.
Be sure to check around and ask for quotes on both the real estate title company service as well as the title insurance offered. Give each company the same information and even consider asking for a written quote to help with comparison shopping.