I went to the Burnsville office of OB/GYN Specialists (they have an Edina office too, I think), and they were wonderful. There was one doc in the group I didn't particularly like, but he wasn't all that bad, really - just different personalities.
I had an u/s at 10 weeks to date the pregnancy - they didn't even peep when I asked for it, just made me aware that insurance might not cover it (which they did). I didn't get an u/s every time, but I got 2 from their office & they checked fetal heartbeat each time. I'm sure if you're concerned, they'd be willing to give you the reassurance you need/want. I have a feeling if they'd had concerns with finding the heartbeat, I would have had an u/s right away.
They are wonderful people - I can't say enough nice things about them. The doc I see regularly has been pestering me to have another kid for the past 3 years since I "am so good at having babies!" :) It was a funny thing to hear, but at least I knew he remembered that I had an uneventful pregnancy & very quick birth.
Good luck!
J.
Mom to Chase (3.5)