When you narrow down a vet, contact your State Veterinary Board, and ask them if the vet has any complaints, has had any formal or informal hearings or any pending, or any disciplinary actions taken against him/her.
I used a vet that seemed like a sweet old man, that killed my dog due to misdiagnosis, and later found out that he had 8 complaints against him, that had resulted in 7 deaths. He was also using just a paralyzing agent to euth animals, which made them suffocate to death, while fully aware. My dog might have lived longer if I had known to check with teh State Vet Board...