It also depends, can you get hold of a coverage map to see if you are in a strong signal area, a weak signal arewa. or a "normally outside of coverage" area.
The vertically stacked X or "bowtie" designs with a large grid reflector, tand to be good for rejecting rear and side reflections , and vertiacal (aircraft flutter) reflections, but the relatively wide beam can be a mixed blessing - good if you have two transmitter sites that are not completely on-axis.
In the conventional long boom designs, more elements are generally better, but you need a sturdy mast to avoid excessive wind-rock, especially in Florida!
If you are in a weak signal area, where gain matters most, I'd also consider using a masthead preamp, as this compensates for cable losses that can never be recovered by a preamp at the bottom of the cable.
Remember, if the signal is snowy (noisy) but otherwise ok, you need more gain.
If the signal is clear but ghosted, you need more directivity, or possibly some adjustment in postioning/aiming - a preamp will never help ghosting