I'm a deck oven fan and to me produces the best crust....
For that volume a double Bakers Pride Y602 or a Blodgett 1060 double. It's not hard to learn, but is more complicated than a conveyor. There is a new "stone conveyor" by Picard with 1" stone plates. I have not seen them live yet....
if you don't want to worry about the cook, the conveyor is the way to go, to me though can't match a deck oven.....