Originally Posted by jetbootz
max current 30amp . ill be using 6S 380KV 15 inch props. I just come from full size aviation background where safety factor is at least 2.5 x
F30A is your best choice (and if you need that 2.5x safety factor - you got it, check FET ratings).
Everything above that - only waste of resources (more weight - aditional 200g on ESC's alone, etc).