I wouldn't neccesarily ever need the full 91" inch height of this tripod but there are very few choices in the 70"+ category. I was pleasantly surprised when I found that just extending the 3 largest sections all the way out is perfect for my height (6'6"). The standard 1548 was just too short for me. This is one rock solid tripod and packing the extra weight is more often than not, worth the effort.
Adding the Op-tech leg pads for me was a must and it is now quite comfortable to shoulder. I imagine it would be hard to find a better tripod when working with 500-600mm glass.