Nick's (Rosecity) is a good guy from what I have heard. I don't go to Rose City Aquarium much. I should because it is just down the road from me just hasn't been on my Fish store route but I will add it Nick, I promise. Good luck with the Blue throat would love to see pics!
I have 2 hippo tangs in the 150 gallon reef tank and they are doing fine. The Picasso trigger we had did fine with all the other fish and they were all initially in a 55 gallon (temporarily until we upgraded to the 150). Keeping them well fed seems to keep the peace.
Be careful with the coral beauty in a reef tank. Some leave corals alone others don't. We had to get rid of our flame angel because it started pecking at the stony corals. Left all the softies alone.