I have the original 4m and 5m Duotone wing and just recently got the Naish S25 5.3 with the goal of learning to use handles. I also have 6m and 4m Echo’s on order but have never ridden them yet. So I can only compare to the V1 Duotones

Hi, just wondering How  tall you are?  Was Also thinking of getting a 4 and 6 echo. But has I did a try this we with the old 5 m , which was fine, and then chatting with the instructor, he said for my height 1.70 m it might be a bit uncomfortable because of the span of the wing ! He also told me the new echo 5 m is more powerful than the old one ....