side note--
I won't ask for details, but if you are only over 40 (and not otherwise high risk), last I heard, the statistics were high risk for the pregnancy, but the *birth* was no higher risk than for younger women ... I don't know for sure that that's still true, but most over-40 women I know are perfectly physically capable of birth :).
I just offer this so that as you approach that part of the process, you know going in that you don't need your caretakers tossing extra fear (or unnecessary medical interventions) your way ... a piece to keep in consciousness. Perhaps a piece to keep in consciousness, as you interview OBs ... the key phrases I kept running into were things like, "well, we'll try it, but usually ... " or the complete (although understandable) sellout, "the hospital requires me to do it that way (to maintain my contract and ability to practice at the hospital)".
I ended up with home-birth midwifes because the medical system and I didn't see eye to eye (as you can probably tell), so I have no OB recommendations ;) ... SIGH. (I *tried* ... I actually worked in the hospital system in statistical research(!) when I got pregnant ... but it just was never going to work.) Midwifery was one of the best choices I ever made ... but, although an advocate, I am also firm that mothers should choose what feels like the best care for their particular birth situation, and that decision includes choosing the environment in which you will feel safest--because feeling safe and protected is the primary driving factor in being able to have a healthy, good, and no-complications birth.
Especially if you choose a hospital, I'd recommend choosing a secondary birth attendant (besides your husband, since if he is there presumably you will want him to pay attention to *you* ;) ) who can run interference with the hospital staff and keep your care focussed and coherent, with or without your OB and during shift changes. A professional doula or a friend who is on your birth-plan page and won't themselves cause stress and bother for you ...
God bless you and your family with your pregnancy and birth--congratulations :)!