Worth every penny.
I have seen the future, and it is the Alt-Berg Tabbing boot!
Alt-Berg prided themselves on making these their lightest boot yet (on par with the sneeker), but they haven't sacrificed any durability. The vibram soles will see these going for a long time, and you can definitely feel the benefit for all the weight they've trimmed off.
This is definitely a next-level purchase, go for them after you have shopped around. Otherwise, you won't feel the benefit. They are expensive, but they are in this range from every supplier.
It is a little annoying how they let water in really easily, but I completely accept that in a road marching boot. Maybe they aren't the best if you want to stay warm and dry all the time, but if you're on a road for ages and ages then there nothing else comes close. Comfy as anything, light as a feather. I'll be resoling these when I wear through the rubber in a few more years.
Best road marching boots I ever owned.