Yes, go with the doctor's recommendation. I had gave birth to all my kids at SGH and im pleased with their service. If you have specific conditions, they may also have you in their high risk preg section where a different grp of gyne will be seeing you.
Go with what was suggested - SGH. I will rather follow the doctors advice then others who are non-professional. Health is always a priority.
My friend who has some condition decided to pick sgh cos that's where she went for her own check ups and she feel safer.
I think KKH is better though