Well, a tough question to answer for others, but I find it rather easy as I believe I have the best answer for you. I was also trying to find answers for a similar question around six months ago when I was searching for the most efficient virtual assistants. While searching extensively, I happened to visit Pentacle Tech, a popular service provider in the USA. After discussing with the company on different hiring models, I decided to put an end to my searches ahead. Today, I am happy that my decision was correct. This experience makes me confident enough to suggest you the right place where you can find top professionals as well.