As far as the c-tuck, you should be able to call the new OB's office and ask if that is something that the physician does. Obviously, you can't be diagnosed over the phone and they have no way of knowing if you would be a good candidate for it or not without seeing you, but you should be able to get a simple yes or no after explaining you are thinking of changing to that office. Also, make sure he's even taking new patients as far along as you are, or at all.
I really think your best bet is calling the new OB office and ask them how they handle people switching to them. That should give you some good information on which to base your decision.
I was so in love with my OB that I gladly travelled an hour one direction to get to see him. Love just poured out of him and he always took time and cared so much.
The bummer was when I went into labor and all the sudden I didn't want to go to the hospital. My mom basically dragged me. She was afraid I'd have the baby in the car. I wouldn't have traded him for anything.
But, if you are thinking about changing, just ask some questions of the new office and make sure they can accomodate you.
I don't think your first doctor would be too upset considering the closeness of the other hospital, etc.
I hope you get some great responses and I know you'll make the right decsion.
Best wishes to you and prayers for a happy delivery!