As far as doctors who deliver at Tarzana -- Dr Platt (top westside perinatologist, former head of ob/gyn at Cedars) recommended the medical practice of Dr Entin and Dr Otta (loved her -- he's very traditional -- a good doctor but pretty dispassionate otherwise). Also Dr Ohad Beh-Yehuda whom everyone loves, I know he's on the valley side, think he's currently at Tarzana, but not sure. But personally, I couldn't imagine feeling safe with just a midwife Births are ,of course, a natural event -- but in the days before doctors, they were higher risk for both mother and child. If god forbid, there were any complications -- I would worry that you would lose precious time by having to call in a doctor to take over. A midwife is not medically qualified -- and able only to handle routine situations. So I just wouldn't take the risk.
Tarzana is small, personal, and things went well for us there but I haven't been there since they got new management (past three years) -- so can't really vouch for its present incarnation