I go to Spectrum OB/GYN on Lake Michigan. I like Dr. Federico and Dr. Lalley there a lot. Dr. Federico is older and kind of kooky, but is knowledgable and friendly. He's genuinely interested in any questions or concerns you might have. Dr. Lalley delivered my baby and was great for us in the hospital. I also really like their NP's too. Janet Mitchell is amazing.
There is an OB office on 44th street near Burlingame (I forget his name- Talcott or something) and I've heard he is GREAT. I have a friend who is a Dr. at Metro (where he delivers), and his patients have nothing but rave reviews for him.
I've only delivered at Spectrum, and I thought it was fine. The rooms and equipment are a bit older, but OB/GYN divisions at hospitals don't make any money, so they don't have the funds to upgrade a lot. I really, really liked the nurses there.
I've heard great things about Metro. Obviously because they are a newer hospital they have more bells and whistles and nicer TV's and stuff LOL.
I would find a great doctor first and then see which hospital they deliver at. You're usually only there for a few days, and your main concern will be your baby.