Heater placement

I'm having a guy come out tomorrow to see how much it would cost me to have him run an NG line out to my garage. Where would be the best place for the heater to mount? I was initially thinking of above the door at the back of this pic, but would that really be the best place? that is where the gas line will run, but what about to the left of the bench in the corner?

The garage is 20x25, uninsulated for now. I'll have that up here soon enough. Or does it really even matter?