Which tripod for the 600mm FL

I use a old Gitzo 1548 for my 600mm FL.  But new and lighter options are now available.

My 1548 folded is just under 23.25  inches(59 cm)  and weighs 3 Kgs. Load capacity 66 pounds ( 30 Kgs). But its big and rock solid. Wont topple in a breeze and has good vibration damping.

My worst case, weight of equipment to be mounted on the tripod,  would be under 10- 15 Kgs

Mostly any Benro/ Sirui/ Feisol with max load around 20 – 25 Kg and folded length under 24 inches will do fine. And the newer tripods weigh at around 2 Kgs, which is a whole 1 kg less ! But what I am still not sure is even though the load capacity is ok  how good are they at vibration damping. Also, the thinner diameter is a bit iffy for mounting one of the biggest lenses out there ! The Gitzo 3 series or equivalent would be the minimum Id look at for a 500mm / 600mm.

Folded length is important so that I can fit the tripod into a suitcase for travel. Hence I prefer folded length under 24 inches.