Ah didn't know your name over here.
I based my design on the classic look:
Blunt nosed Far Trader
There is a more aerodynamic look out there, an excellent artist's conception, but I can't find a link now. It is probably what you would prefer. The noses are less blunt and more wedge shaped. I know my external views are very, very lacking (my graphic of the front of the Far Trader is almost laughable). I am no artist at all, I make the external views just to show where all the doors, ports, windows, etc line up with the deck plans.
I like staying with the classic styles if I can, even if they are deficient (such as the turret location you mentioned).