I recently tried a mid-rider. I'm 5'9 185 lbs. I didn't like how the mid-rider seat moved me up and forward. A little more reach to the ground but that didn't bother me as much as the change in seating position.
I did think the seat was beautiful and extremely comfortable. Maybe a little too soft for me but still all-day comfortable. My co-pilot thought it was way better than the stock seat.
If you're on the fence about mid-rider or king, go with the king.