</font><font color="blue" class="small">( level, throws stuff on you and scalps )</font>
That's funny /forums/images/graemlins/grin.gif
I have both types. I find a pull type follows contours a bit better, but will still scalp sharp irregularities (erosion terraces), as will the 3pt also. The 3pt with floating toplink, set up for no sway, and 1-2" front low does quite well. I think you need a 4pt caster system to avoid scalping altogether, if that's a major concern.
The main advantage would be extra cut width for pull type vs 3pt due to transport weight. I don't care for the pull in tight corners or rough cutting. They don't back well at all over brush and there is a bit more maintainence with 2 extra tires and seasonal replacement of swing bearing. ( I find if I don't replace it once a year, I have a flopping shaft sometime the next year) You might look into semi-mount models that eliminate the swing bearing problem.