gquiring...
no i do not know everything... but there is a wealth of info available on the web from the manufactures. as to with what brand to go with, that is personal preference, i fly only JR (except way back the 3001's), why? NEVER had a servo failure with them, others fly futaba, multiplex, hitec... why? because they had good experience with that brand...
so... if you have been in the rc hobby for 30 years i believe you really should have you preference by now. you also should know that skimping on the electronics in helis will only cause trouble (but you should know that anyway...)

after ALL the input from others... you go with what you have in your other helis... my point...

peace and be safe...