I'm so confuse , I want to choose the right doctor for my FFS , but it's getting so difficult , please I need some advice , I wen to have a consultation with Dr, Sinclair in Beverly Hills he seem really good doctor , but I really need an advice pls.

Well there are a lot of factors individual:

Is cost important to you?
Is geographic location important to you?
What surgeries are you having done? And who's results do you love most on those?
Who else are you considering? Both Dr. Z and Dr. S do Skype consults so at a minimum that is costless and pain free.
Which surgeons do you get good vibes from?

Out of curiosity why Sinclair? What do you mean by good doctor? Or rather, what does that mean to you?