Hey... seems like a late reply.
It depends on where you fly... What are you trying to accomplish? Where in the world.. I'm not trying to avoid your questions.. but.. Africa or Island flying is not the same as Europe or USA.
To give you a quick and dirty answer... at best.. 3500nm. in non USA type environments.
you know what the numbers say from EMB... but.. that's ideal conditions, on both ends of the trip.
PM me if you want more info. but.. yeah, don't listen to brokers, they will always give you BS
the 650 and the E version are exact same.. just better avionics.. and autothrottles.
2 pilots and one FA. I've seen some operators not go with an FA, but, it's alaways a mess. The customers try and server themselves.. and end up breaking things... or get frustrated.. or they ask the pilots for help.. distracting you on approach.. etc..