L.T.
I agree with the other poster, Dr. Koster is amazing! She's a perinatologist so her job is dealing with high risk/complicated pregnancies...I saw her with my 1st baby and she was great. She can also refer you to a good OB that she'll work with during your pregnancy.
I've also heard fantastic things about Dr. Arlene Jacobs too for an OB. I actually tried to see her about 4yrs ago but she wasn't accepting new patients at the time so I chose another doctor within the practice. I had a bad experience. You can always try to get in with Dr. Jacobs and if they say she's not taking new patients then try Dr. Diaz. I saw her while I was in the hospital and I liked her. Beware of Dr. Umholtz, though...she has horrible bedside manners and is just not very polite. You won't get warm and fuzzy from her. I had to talk to her once while she was on call and it was a horrible experience...I also have 3 friends who use to see her and they switched doctors b/c they got tired of her lack of being friendly or she was ignoring their concerns. I don't see her being very good with a complicated pregnancy with the lack of patience she shows. I would give Dr. Jacobs and Dr. Koster a try though!!!
Good luck!