For the Op,, with limited space, I'll throw in a bit of my thoughts.
With only one press, and the space you have,, study how YOU like to work. The Dillon 750 is a fairly automated machine,, but you still have to work. Figure out where you want your scales to go. Leave enough space on both sides to not feel "cramped" when moving your hands. Do you have it on a strong mount or directly on the bench? if using the strong mount, does it have the bullet tray? Do you have the case feed assy? if so, do you have power easily available? Can you load the hopper easily?
Will you be sitting or standing when operating it?
You can see it is a matter of available space, your specific press & accessories, as well as your preferences in motions.
So, with limited space,, I'd basically say you'll feel more comfortable with it in the middle, where you can balance yourself with whichever tasks you have, as well as allowing for the addition of potential accessories later on.